Original subtitles

(Mouse)

(Part 2 of Mouse begins now!)

(The secret behind Mouse will be revealed.)

(Q and A with the Actors)

(Who will begin the new hunt down?)

(The many stories about Mouse)

(Is Jae Hoon the young Ba Reum or young Yo Han?)

(A to Z with the Actors)

(The real story begins here with the preview of Episode 11.)

(Bong Yi TV opens to celebrate Mouse: Restart.)

(Bong Yi's interview!)

(Bong Yi will bring you her behind-the-scenes vlog.)

There were two men...

who were family to some...

and the son of their parents.

However, fate brought them to chase after one another.

(They chased after one another.)

One died...

while one survived.

But even the one who lived didn't realize...

that his real battle...

began the moment we woke up.

Finally, it's quiet.

(A 10-minute recap of Mouse)

There he is.

- Officer Jung! - Thank you.

After being severely injured while arresting the killer,

Officer Jung Ba Reum barely made it back to health.

(Narrated by Kim Jung Nan)

Where's my mom?

A car accident on a rainy day took her away when you were young.

How is it that I don't remember anything?

(The incident left him with short-term memory loss.)

Bong Yi, I'll marry you once you come of age.

There were many he had to remember,

but his mind couldn't picture any of them.

(He discovers a dead body out on patrol.)

Instead, his mind has flashes of memories...

that feels foreign to him.

What is this feeling?

I guess she was murdered after she got robbed.

No.

- What? - It's just a camouflage.

The murderer didn't kill her to take revenge.

Officer Jung, what's with you?

I'll talk to him.

(Once he's back at work,)

(he encounters his old colleagues one by one.)

Crazy freak!

Only one person welcomes the somewhat-changed Ba Reum.

You haven't changed at all, Officer Jung.

Do you know me?

(He suddenly gets flashbacks of memories.)

Does your head hurt?

Detective Ko Moo Chi!

Ko Moo Chi is a detective who chases after psychopaths.

He stabbed her in a way that wouldn't kill her,

enjoyed the pain she was in,

and then choked her at the very end.

Only a psychopath would kill in that manner.

This wasn't his first killing.

- What? - If he's not caught immediately,

he'll kill again.

How can you be so sure?

I just... I can just feel it.

You seem different. Compared to before, I mean.

Moo Chi starts to trust Ba Reum...

and asks him to investigate a case together.

(He asks Ba Reum to help him investigate a case.)

Let's catch the killer together.

We should transfer this to Violent Crimes.

No. This changes everything.

If you're right, he has killed two already.

But you said last time...

that he may have killed more before.

The two find out that this case was actually related...

to the serial murder case that occurred 25 years ago...

and goes to meet...

the serial killer, the Head Hunter.

Your eyes look different...

compared to how they looked before the surgery.

This is a very important issue.

I never used that knot, learned it,

or taught it to anyone.

Ba Reum asks the Head Hunter about the knot he found.

If you never taught this to anyone,

how could someone use the same knot...

that you used to kill that little child?

Why are you asking me?

The Head Hunter shows him something instead of giving him an answer.

Say hello.

He's my cellmate.

A mouse.

He was introduced to a mouse.

Along with a headache, he gets flashbacks of unfamiliar memories.

What is this memory?

(While Seo Joon enjoys the sight before his eyes,)

(Ba Reum feels confused due to the unfamiliar memories.)

Whom did those memories belong to?

What in the world was that flashback?

Where were all those memories coming from?

(Where were all those memories coming from?)

What are you looking for?

I'm looking for a photo album.

Like photos from kindergarten.

Why all of a sudden?

I have this vague memory of back when I was little.

Ba Reum tries hard to retrace his memories.

In that process,

he starts to remember the memories he built with the people he loved.

(He starts remembering the memories he built with the people he loved.)

I'm sorry I came too late.

I'm sorry it took so long to remember you.

As things slowly started to fall back into place...

(However...)

He suddenly starts to feel uneasy about something.

This man...

(The murder case evidence starts giving him flashbacks again.)

What is this?

Why is a guy Sung Yo Han killed in my memory?

You must read a lot of files...

regarding Sung Yo Han before the accident.

You're mistaking what you read in the files...

as your own memories at the moment.

As he traces his memories, he finds out something shocking.

He operated on you?

- Yes. - That's not him.

It is.

The doctor had a scar on his face.

A long one on his right side.

A scar?

(In that very moment, he suddenly thinks of someone.)

What on earth did he do to the mouse's head?

He used to be a hotshot neurosurgeon, right?

Surprisingly,

the person who operated on him was Han Seo Joon, the Head Hunter.

Don't tell me...

you implanted Sung Yo Han's brain inside me.

Is that what you did?

You figured it out faster than expected...

which reduces the fun.

No, it's a lie!

Ba Reum finds out he was able to live...

thanks to a deal that involved Han Seo Joon.

(What was the story behind Ba Reum's brain transplant?)

This was Sung Yo Han's brain.

Your frontal lobe was severely damaged,

so Sung Yo Han's was harvested and then planted into yours.

What you did is a crime!

I know it's an excuse,

but we couldn't turn our backs on the people's hopes.

No, you used me to stay in power.

If I die, it'll hurt your chances...

at the upcoming presidential election.

A photo of you in kindergarten.

(The kid from his flashbacks wasn't Ba Reum!)

Ba Reum finally starts to understand what's been going on.

They aren't my memories, but Sung Yo Han's.

Every time he finds himself becoming violent,

he gets an ominous feeling.

All you had to do was pretend! Why did you squeeze so hard?

Please don't let me...

become a monster like Sung Yo Han.

Please.

One day, someone commits a copycat crime...

using the same methods as Sung Yo Han's.

I smell mint.

When we rolled down together, he smelled of mint.

It's his smell.

But why am I smelling that here?

No way.

Ba Reum starts to think that the actual culprit...

might've been someone else.

He buries himself in solving the case...

to get rid of his anxiety.

Someone else is the killer.

Good. I'll catch him myself and prove that my new brain...

belonged to a normal person, not a murderer.

After a persistent chase, Ba Reum succeeds in catching the culprit.

Tell me the reason.

Those lustful and wicked skanks.

I judged them for the deity.

You low life.

Are you kidding me?

What gibberish is that?

It has to be him.

Song Soo Ho. Kim Sung Gyu. Byun Soon Young.

Jo Mi Jung. Bong Yi's grandma.

Why did you kill them? Why?

What are you talking about?

Sung Yo Han killed them.

Don't lie to me. You killed them.

The person who killed all those people...

has to be someone other than Sung Yo Han.

(The culprit can't be the person inside his head.)

However,

Ba Reum eventually faces the truth he never wanted to acknowledge.

It really was Sung Yo Han.

It was him.

And suddenly, his natural instincts...

slowly start to take over.

Kill him. Kill him. You should kill someone like him.

(Will he get overtaken by Sung Yo Han's brain?)

Oh no.

I think he died.

How does it feel?

(It's Yo Han!)

You.

Isn't it exhilarating...

to kill a person?

As Ba Reum starts to become more and more like a killer,

what kind of fate will he end up with?

(Where is his fate headed to?)

What? What's going on?

(Startled)

(Embarrassed)

- Stop pretending to work so hard. - Seung Gi.

I'm working hard.

(Bong Yi's vlog will start soon.)

(Be careful of these people! The villains of Mouse)

Psychopaths are a result of mutated genes...

that occur as society develops.

(An instinct to commit murder with no sense of guilt)

They're born with hardly any MAOA genes.

I had said the remaining five were killed randomly.

(The way he kills people builds fear among society.)

(He's meticulous enough not to leave behind any evidence.)

(Is he a genius or a narcissistic killer?)

(The Head Hunter, Han Seo Joon)

They were killed by the so-called Head Hunter...

who kills people and beheads them.

The entire country was in turmoil due to the grotesque murders.

Please, don't kill me.

Meanwhile, a horrible incident occurs...

at a nearby camping site.

Moo Chi sees the culprit leaving after having killed his parents.

Think properly.

Did you see his face?

It's... It's him. I clearly saw him with my own eyes.

The person he saw was...

Wait. What are you doing?

Like you don't know?

Head Hunter.

Head Hunter? Me?

I'm speechless.

The killer was the famous doctor,

Han Seo Joon.

(The famous doctor, Han Seo Joon, was the Head Hunter.)

What a great day to hunt.

Tell me. Why did you marry me?

Why did you marry me when you don't love me?

I guess you can call it...

my will to reproduce.

- You! - Get him.

(Han Seo Joon, the Head Hunter, was living a lie.)

If the psychopaths...

or murderers in the drama...

looked too obvious,

it'd be very easy for them to get caught.

In order to be smart enough...

to hide his true identity,

he should seem like a normal person.

I thought he should look like a regular member of society.

That needs to be portrayed well...

for the twist to leave more of an impression.

The brain only weighs 1.4kg.

But it contains the entire life of one human being.

It's interesting.

That means I have the power to control someone's life.

That's what you call a deity.

There's nothing special about being a deity.

His envy toward his friend and twisted ambition...

led him down a dark path.

I couldn't believe he was trying to invade my realm of the divine.

(Han Seo Joon desires to reach the realm of divine...)

(with brain transplants.)

Eventually, he did the unthinkable.

I needed brains.

Human brains.

Why am I a psycho?

Why am I a psycho?

I must exhibit my ability to save humanity. Through me...

I'm a genius.

Were strong security measures taken?

This ward has been closed off and can't be accessed...

by those without clearance.

It'll be over for us if word gets out.

Thanks to Young Shin's offer,

Seo Joon returns to the operating table.

Don't think you've been wronged.

You, at least,

you get to live on like this.

He performs a surgery to transplant...

a portion of Yo Han's brain into Ba Reum.

Ba Reum was the first attempt at a human brain transplant.

This is the start...

for Han Seo Joon's dream to come true.

The Head Hunter Han Seo Joon, who coveted the deity's territory.

What was the statement he wanted to make?

Every achievement requires minor sacrifices.

Don't you agree?

(My identity can't be exposed!)

(The Two-faced Man, Sung Yo Han)

If you want to die, cut deep right here next time.

If I also take out this needle,

blood will shoot out from both of you.

The man as cold as ice...

with no empathy. Sung Yo Han.

Scalpel.

Whereas he was a gifted surgeon...

Let's see.

The man with another face behind the scrubs.

He is very suspicious.

Yo Han is very quiet...

and antisocial.

So I stopped meeting up with friends in real life.

Naturally, I started talking less...

and went from a cheerful image to a more calm and quiet image.

The surgery went well...

Dr. Daniel Lee goes to see him...

as well as Bong Yi's grandmother who came to clean his house.

- And who may you be? - Isn't it obvious?

You called for a housekeeper.

Coincidentally, they both went missing...

or died immediately after meeting Yo Han.

My goodness.

Yo Han is very calm...

and quite emotionless.

The ending scene of episode three...

was Ba Reum chasing Yo Han.

It was about -15 to -20°C.

It rained a lot too, so it was very cold.

On top of that, the alley was very high and steep.

So it was dangerous.

And since we were filming while getting wet in the rain,

it was very hard to withstand the cold.

It came out nicely though, so it all felt worthwhile...

and it made me happy.

Yo Han, the prime suspect was identified...

by Detective Ko Moo Chi who has animalistic instincts.

Where were you last Sunday evening until dawn?

Yo Han wasn't feeling well, so I went over to his place.

(Yo Han)

Is he gone?

Did you tell him what I told you to?

Come to think of it, his friend who lied to create an alibi...

and the mysterious look on his mother's face are suspicious.

(Moo Chi follows Yo Han, the prime suspect.)

(Even the most perfect crime)

(Will be exposed if you leave a trail!)

The truth behind the case is finally revealed.

The bloodstain on Sung Yo Han's shoes...

corresponds with the DNA of the guy that was found underneath the sea.

So it's him.

You knew, didn't you?

Knew what?

That your son is a murderer.

- Search the entire place. - Yes, sir.

Due to the police investigation closing in on him,

Yo Han ends up dying.

And like that, it seemed the evil...

received the deity's judgement.

You grew up into a beautiful lady.

My sweetheart.

I can't believe they copied this.

I knew something like this might happen when people...

started talking about creating a fan club after Sung Yo Han died.

However.

Countless brutal murders continued to occur thereafter.

Can this cycle of evil deeds...

come to an end?

(Can the cycle of evil deeds come to an end?)

The reason I showed up today...

is to report from the scene...

as the youngest member of the cast for the special Mouse episode.

- She's the best actress. - Bong Yi is the best.

It's always so much fun.

Which scene is this?

- Bong Yi's interview. - Interview.

Hold on.

Okay.

He's studying the script at the site.

What? What is it?

(Surprised)

(Embarrassed)

- Hey. Come on. - Seung Gi.

Why are you filming me working hard?

You're working so hard.

What were you looking at?

What? I was looking at a scene with Bong Yi.

What does Bong Yi mean to you?

Bong Yi is a cute little sister.

You're like a cute little sister to me.

Nice. Nice.

Since I'm the host, I won't sit.

- Right. - You're usually...

- The guest is supposed to sit. - Right.

- You should stand. - Okay.

Bong Yi's interview.

Is that... That's it?

"Bong Yi's interview"? That's it?

- I just decided on it. - I see.

- Bong Yi's interview. - Interview.

People are very curious about the killer in Mouse.

I can't tell who it is even after reading the script.

Even the script confuses me.

Did you read it carefully?

Anyway, we've reached the halfway point of Mouse.

- Right. - How do you feel?

So many people have been supporting us...

and are curious with us...

This signifies the twist, the way you challenge yourself,

your transformation, and success of your acting career, right?

- In my opinion, - Really?

it is so different from your existing image...

but it came out nicely.

What was my existing image?

(Flustered)

(Laughter)

No one relaxes the mood as well as you do.

I hate being serious.

- Really? - Yes.

Really? You wanted me to compliment you.

- Do you know what our nickname is? - What? What is it?

- Ours? - Our nickname.

- What is it? - "The Ba Bong Couple".

(Ba Bong Couple)

- Ba Reum and Bong Yi. - People say...

"Ba Bong."

- Ba Bong. - I feel like...

- It has a nice ring to it. - Yes, totally.

Ba Bong has a nice ring to it.

I was reading the script, and we're in trouble.

Why? Because you have crazy air time?

I don't think the viewers will be able to get out of our drama.

Seriously. They're dead.

- Because it's so good? - Those who have been watching...

Bong Yi, we need you.

They can't quit. It's like a drug.

- They need Bong Yi. - Bong Yi's going.

(Bong Yi is shooting now!)

(Gyeong Su Jin: playing Choi Hong Ju)

- We will now meet with Hong Ju. - Yes.

As I'm the youngest, I'm hosting...

- You're the host. - And... Yes.

You're the host? Host Bong Yi?

About half of Mouse is done.

- That's right. - It's half done.

How do you feel?

It isn't just me.

All of the actors are working hard.

It's especially hard for Ba Reum and Moo Chi.

- Right. - You have many action scenes too.

I know.

- Were you expecting it? - No way.

I had no idea. No one told me...

(Mischievous Bong Yi)

How's your chemistry with Seung Gi while filming?

It's awkward.

Really?

- It's awkward. - It's much better now.

- We've gotten closer. - Sure.

We didn't have many scenes together earlier on.

There's something I want to tell the viewers.

Hong Ju...

She tries her best...

to track down the psychopath.

- Right. - Things like that...

- Am I in the frame? - Hold on.

Hold on a second. My arm... I'm sorry.

- Say it again. - It was important.

I was talking about something very important.

If you're curious, you must keep on watching.

That's right.

(The conclusion is, keep watching the show!)

What was the chemistry like between you and Moo Chi?

I think he was solely focused on that character...

even while carrying on his day-to-day life.

(Talking passionately)

(My arm's getting tired.)

- Am I boring you? - No.

- Hold on. - This is important.

- Where are you going? - I'm really sorry.

My arm really hurts.

- Yes. - What a unique interview.

As an actor, he was very focused on his character, Ko Moo Chi.

But I have to say, every scene is so much fun.

When I do something, he just knows how to respond.

When I asked her about Ba Reum,

she only said one thing.

But with Moo Chi,

she keeps going on and on about him.

By the way, what's Ba Reum going to do?

What? He has so many scenes to shoot.

- This is... - He has so many scenes.

- We should edit this out. - No, don't!

(Feeling nervous)

Duk Soo!

Here's our Kang Duk Soo.

Can I not be in this thing?

Everyone's bad-mouthing my character.

I feel so bad whenever I think about Bong Yi.

No, it's okay.

- It was great. - We're not actually like that.

That's right.

Please don't hate me.

He's very sweet in real life.

- He has such a warm heart. - I'm so fond of Bong Yi.

What is Mouse's biggest charm?

The fact that Bong Yi is in the show.

Bong Yi is our number 1. Number 2 is Hong Ju.

Number three is Kang Duk Soo.

Did you have any challenges?

I can't read the script.

Whenever I read it, I get so depressed.

I can't read it at home.

I've been reading the script in the parking lot.

All alone, in my car.

I want to finish shooting my scenes soon.

I've never felt this way before in my entire acting career.

But even when I'm all stressed out,

I look at Hee Jun and think...

"Oh, I actually have it pretty easy."

- Hee Jun, I'm rooting for you. - Go, Hee Jun!

- Seriously. - Go, Moo Chi.

How did Bong Yi do as the host today?

You did an awesome job. Bong Yi is the best.

- I love Bong Yi. - Thank you.

I love you too.

(Love is found everywhere at the shooting site of Mouse.)

(Bong Yi TV quietly approaches him.)

- What's up? - Gosh, you startled me.

The cherry blossoms have bloomed. Spring is here.

They're in full bloom.

We started shooting in winter.

This is important, so don't mind me. I'll just keep shooting.

How can I not mind you? You're closer than the main camera.

Guess which scene this is?

Watch Episode 11!

Dear viewers.

We're halfway through the show now.

Look forward to the rest of the show. I have to go!

Cut!

(The key to the truth, Jung Ba Reum)

Officer Jung Ba Reum received a big surgery three times,

but he still hasn't woken up in over 10 days, so many people...

The entire nation is rooting for Jung Ba Reum.

Any parent would want to marry their daughter off to him.

He looks very kind and gentle.

Righteous?

That's Ba Reum's charm. He's righteous.

Just like his name, he's righteous and friendly.

He has a goofy side to him as well,

but as a police officer,

he has a strong sense of duty. That's what I think.

Everyone praises this guy.

That must've startled you. I'm very sorry.

You almost died because of that bird!

You're right. I'm sorry.

He can't even pass by a small animal in need of help.

He's that compassionate.

Is he kind or stupid?

Jung Ba Reum's name spells out his charm.

"Jung Ba Reum."

I'm sure everyone would love to have a police officer like him...

in their neighbourhood.

- Cute, right? - That's his biggest charm.

Officer Jung, why are you carrying this down?

- He enjoys helping the residents. - Of course, I should help.

Bong Yi! No!

His specialty is letting Bong Yi beat him.

I'm a bit sweaty because I'm nervous.

There's a hole in my armpit.

- What's he doing? - Ba Reum also has a goofy side.

He's pretty good at slapstick, isn't he?

Before we talk about his character, actor Lee Seung Gi...

is so amazing. He's very considerate of others.

He's a good guy.

I think that naturally comes through when you see his character.

I'm sure he had a reason.

Ba Reum has such a kind heart, and he cries easily.

He also has many nicknames.

Do you receive bribes? This place is huge for one person.

I bought it with my parents' insurance money after they passed.

He's grown into a wonderful man despite...

- Do you want something to drink? - the difficult circumstances.

(Nickname 1, Everyone's Ideal Son)

Officer Jung, I love that you're a good eater.

He's also every parent's ideal son-in-law.

Why are you eating like a bird? Eat more.

You can't help but fall for his sweet charms.

He's a heartthrob.

Do you really want...

to marry me?

Again, you're being an annoying jerk.

He's the only one left on my side.

Ba Reum is my only ally.

I'd say he is...

my only family now.

He's the only person...

I can really open up to.

Ba Reum. Ba Reum!

Ba Reum.

But Ba Reum changed.

Do you really not remember me?

Nothing at all?

I'm tired. I'd like to get some sleep.

Ba Reum doesn't remember anything because of the accident.

I must've been a good person.

There's no doubt to that.

You were a model student who never got into any trouble.

It's been the same in your adult years.

You are a kind and upright young man.

(Ba Reum can also run unbelievably faster now.)

Did he suddenly gain some kinds of superpowers?

He's unbelievably strong now.

- I saw a dead body. - A dead body?

There's more. Now, he doesn't even flinch...

when he sees a dead body.

The killer intentionally slammed her face into the mirror.

Intentionally?

And his investigative abilities have immensely improved as well.

If we don't catch him right away,

we don't know how many more people will die.

How are you so sure of that?

I just am.

I wonder what I'd do if I were the killer,

and it comes to me.

He's a complex character.

It must be very difficult to portray the character,

but he's doing such a great job.

There are moments when his gazes and the things he said...

suddenly remind me of Yo Han.

When that happens, I get confused. I think to myself, "What is this?"

What about his face? Did you see his face?

Who are you?

Forget the guy...

who used to helplessly lose the suspect right before his eyes.

(I'm not the old Jung Ba Reum.)

It's why he tied a different kind of knot...

than the one previously used.

- Check this out. - The lawyer for...

- This is Woo Hyung Chul... - Jung Ba Reum...

now leads the investigation with meticulous attention to detail.

Hold on. Did you study up on psychopaths or something?

What makes you so certain?

- I can just feel it. - That again?

Did you spend some time in a psychopath's brain?

Now, people call me Not-So-Righteous, Mr. Twisted,

and so on.

When portraying a character, the actor must figure out...

why the character behaves a certain way...

and says certain things so the viewers can understand...

where that's coming from. How should I put this?

Maybe the starting points of the emotions are different?

Let's say this is where Jung Ba Reum's emotions begin.

This is where it begins for the new Jung Ba Reum.

He's someone with emotions that are heavy and down.

Oh, even that time...

The instincts he didn't know he had slowly awaken.

And now, no one can stop him.

Sung Yo Han's brain that's in my head...

Quiet.

Shut it!

When will the whining stop?

(Ba Reum reveals his aggressive nature and hostility.)

As if you know anything.

Have you seen your family die?

Have you seen your family die before your eyes?

(He suddenly changes.)

This is all your fault,

Ko Moo Chi.

The changes in him affect the people around him as well.

First off, the relationships change significantly.

I'm the only person who can stop me.

It's not like someone's willpower...

can stop me.

But when I see Bong Yi, I feel guilty...

and pain.

I feel like you can read the mind...

of killers.

Moo Chi welcomes these changes in Ba Reum.

About Ba Reum... Did something happen to him?

But Bong Yi is worried upon noticing the changes.

Why is this happening to me?

And this man...

who is intrigued by the changes in him.

I once transplanted...

the frontal lobe of a violent mouse into a docile one.

The mouse that used to be docile...

slowly started to become violent.

And in the end...

Are you scared...

that the same thing might happen to you too?

I'm also quite curious myself.

You were the first human to get a frontal lobe transplant.

But I hope...

that you won't let Yo Han take over you.

I really mean it.

His innate goodness and his new instinct...

now battles inside of him.

You think your loss will be greater than mine?

I could lose myself as I know it.

Sung Yo Han's mind might take over mine!

If I'm the one who led...

the first half of this show's story,

the second half is up to Seung Gi.

In that sense, he's been doing a great job.

(The actor leading the second half of Mouse)

(Lee Seung Gi)

Which choice will he end up making?

Not even I know what will happen to Ba Reum.

The hunt will begin.

The one where Ba Reum finds himself.

That'll be the main theme of this show.

There will be quite the back blast...

when all the mysteries and tricks are revealed,

so I hope the viewers stay with us...

and enjoy the show as they accept it.

(Q and A with the actors will begin shortly.)

(Ba Reum's allies who will prevent him from turning evil.)

(The self-proclaimed expert on psychopaths!)

(The passionate detective of the Violent Crimes Unit,)

(Ko Moo Chi)

(Moo Chi is at a stand-off with an offender.)

Just stay there...

and I'll shoot from here.

I should really quit drinking.

Where did you go?

The man is always more action than words.

Darn it.

In Mouse,

I play the outlaw detective, Ko Moo Chi.

Not only that, but he has quite the temper too.

This troublemaker...

is the passionate Detective Ko Moo Chi.

Why don't you quit the squad and go into writing novels?

When it comes to his job, he's like a bulldozer...

which I find to be cool and admirable.

Moo Chi is investigating the murders of a serial killer.

The fact that the culprit took trophies means...

the two cases were committed by a dangerous psychopath.

People like this culprit think of murder as a hunt.

He might even be hunting someone right now.

While observing the way Moo Chi solves his cases,

my character feels joy...

and wonders if he could be the same way.

This is a katydid.

Thanks to his keen eyes and animalistic senses,

he's able to correctly guess the killer's motive.

I'd like to learn from you.

- What? - Let me join the investigation.

Have you ever met a psychopath?

What?

It's much more than you imagine.

It's a frightening monster that a naive puppy like you...

can't ever imagine.

Only guys like me who have nothing to lose...

with nothing but evil left within must deal with them.

25 years ago,

the notorious serial killer known as the Head Hunter...

murdered both my parents.

If I'm given the chance,

I'd love nothing more than to kill him.

Let me die in his place.

And his brother, who was the only family he had left,

became the target of the psychopathic killer Predator.

I'm all right.

This is your last chance.

Get angry. Show your wrath.

To the Head Hunter who murdered your family.

To the world who didn't give him the death penalty.

Let your anger explode.

Moo Won, please.

I'm sorry.

He once again is forced...

to relive the pain of losing a family member.

Moo Chi's tragic life is entwined with those of psychopathic killers,

and now all he wishes in life is revenge.

(All he wants is revenge!)

It was terrifying for me to relate to and understand...

the life and emotions of a character...

with such a tragic tale.

The thought of his pain seeping into my heart...

left me quite worried as an actor.

It's why I've been trying hard to manage...

my mental health as well as my physical health.

I killed him. Arrest me.

He's dead.

Moo Chi confesses to a murder he didn't commit...

to be taken to the same prison Han Seo Joon is at.

Overnight, he went from detective to murder suspect.

(He became a murder suspect.)

You're bound to resist if someone attacks you.

So why did he not resist?

But Ba Reum and Hong Ju aren't ones to let him be framed this way.

They figure out the real killer...

and prove Moo Chi's innocence.

I think I know who killed him.

What are you doing? Come out.

What do you mean?

Shut it and come out.

(Thanks to Ba Reum and Hong Ju, Moo Chi's name is cleared.)

Officer Jung?

- Officer Jung. - Yes?

Would you like to join my team?

- Me? - He doesn't seem like the type,

but he's got good detective skills.

Send it to the NFS.

Ko Moo Chi is a detective...

who shines the brightest when investigating a case.

Let me catch this jerk.

Moo Chi's bad blood with psychopaths.

What will eventually come of it?

What the viewers can look forward to...

is the fun and thrill one feels...

while trying to solve the riddles and mysteries.

Every little clue counts, you see.

I've shot my fair share of TV dramas,

but there hasn't been one where you keep finding clues...

the more you repeatedly watch it.

That'll be something to enjoy as you watch the series.

I'll look forward to it too.

(It's up to me to protect myself.)

(The wounded Oh Bong Yi)

Eo Bong Yi. Hey, Eo Bong Yi. Eo Bong Yi. Wait.

It's not Eo Bong Yi. It's Oh Bong Yi, okay?

- Bong Yi! - The girl...

who always has her guard up.

Grandma, I'm so sick of hearing you talk about him all the time.

She's not one to speak kindly to even her grandmother...

who's her only remaining family.

Bong Yi is a girl who doesn't give up on herself...

and tries to overcome...

the scars and trauma that were inflicted on her.

Officer Jung gave it to us.

He told me you seemed to like the bird.

What a weirdo.

I never liked this bird.

(She complains for no reason.)

(Bong Yi pretends to be annoyed when she isn't.)

Gosh, that brat has such a nasty temper.

However, deep down,

she's as sweet and fragile as one can be.

She's rough and abrupt...

in the way she talks and acts.

But that's not what she really means.

She harbours too much pain inside...

which manifested that way...

to protect herself.

Being a softy deep down is part of her charm.

If I didn't listen to you,

I wouldn't have gone out to buy your makgeolli.

Then that would never have...

What's the reason behind the wall Bong Yi has up around herself?

(Why is Bong Yi so prickly?)

It's because she was deeply wounded...

as a result of an incident that occurred 10 years ago.

Sweetheart!

Until we meet again!

I'll kill him...

once he's released.

Promise me.

Bong Yi can be a character that can annoy many people.

She's heavily traumatized...

and lives in fear based on that,

which prevents her from opening up to others.

So I get why she can be annoying.

But I believe she should come off as genuine...

when she expresses her feelings.

That's why I've been trying to convey those emotions correctly.

Bong Yi's still traumatized by her past,

but she trains herself daily...

not to ever become a victim again...

and she grows stronger every day.

Nice.

And the other reason she can stay strong...

is because she has Ba Reum in her life.

- Ba Reum. - Yes?

Never mind.

But Bong Yi faces yet another traumatizing event.

(Tragedy finds her once again.)

Can we talk?

- Let me go. - Bong Yi, wait.

Let me go! Let go!

Grandma.

What's my grandma doing there?

Bong Yi loses her grandmother...

to the hands of the serial killer known as Predator.

- Sir. Sir. - Bong Yi, wait.

- Leave already! - Grandma.

- Grandma! - Just go!

Bong Yi and I shared a scene in the rain...

when her grandma passed away.

Out of all the days we filmed, it was the coldest outside.

Despite being young, Ju Hyun...

didn't let the cold faze her which inspired me to do better too.

Please hurry.

And things took a turn for the worse as Ba Reum was gravely injured...

while fighting the Predator.

(Ba Reum injures himself while fighting the Predator.)

Don't look at me like a stranger.

You've always been...

so kind and generous to me.

She's then hurt by Ba Reum...

who fails to recognize her.

I'm sorry I came too late.

I'm sorry it took so long to remember you.

However, Bong Yi didn't give up...

and kept waiting for Ba Reum to remember her.

Hurry up.

Will Bong Yi be able to protect herself...

as well as Ba Reum, who means a lot to her?

Before Bong Yi started doing sports,

she was smart and got good grades.

And she's good at sports,

so I think she'll be of help throughout the drama.

This drama isn't over until it's really over.

You can try guessing all you want,

but we will surprise you with more.

So please stay curious...

and stay tuned until the very end. Promise me.

(Full of passion and mystery)

(TV producer, Choi Hong Ju)

How about this, then?

She does everything she can to investigate for her show.

A cop hooked on illegal gambling.

If this is aired...

(She has the guts to blackmail a police detective.)

Darn it.

She's Choi Hong Ju, also known as "Sherlock Hong Ju",

a producer of a current affairs TV show.

Choi Hong Ju is a competent TV show producer...

who won countless awards ever since she was young.

And she's does everything she can to investigate a case.

She's a brilliant TV producer who's good at her job.

Get lost.

She has a knack for bothering...

Detective Ko Moo Chi.

And her hobby is...

to do field investigations with Moo Chi.

What are you doing?

(She's an expert in re-enacting crime scenes.)

This was how the body was found.

Look where the finger is pointing at.

The reason she keeps bothering Moo Chi is because...

Hong Ju is also investigating a serial murder case...

that was committed by a psychopath.

The consciousness of a psychopath...

- Please save her. - You need to wait outside.

You're not allowed in here. Please go.

But she seems to be overreacting...

even if it's to investigate for her show.

My poor Soo Jung.

Soo Jung.

Hong Ju actually has a secret she hasn't told anyone.

Tie her up before she wakes up.

When she was young,

she was with the infamous Head Hunter.

I should've killed him back then.

Right then.

The overall storyline is about psychopaths.

So a lot of the stories...

are very closely related to the main characters.

So things can get confusing due to the variety of characters.

I'm scared.

- What is it? - Just a second.

Let's just stay like this for a bit.

On top of that, she was even in a relationship with Yo Han,

Han Seo Joon's son.

I pitied you for suffering...

because you were a murderer's son.

I thought you were similar to me.

That was why...

You won't receive salvation even after death for what you did.

When I shot that scene,

I felt...

so many emotions at once, but I still had to be cold-hearted.

It was heartbreaking...

to find out that the man I loved was actually a psychopath.

It was very difficult to shoot that scene.

I felt a mixture of emotions.

Along with Sung Yo Han's death,

Hong Ju's past slowly starts to come to the surface.

Hong Ju went through a lot of things in the past year.

And she's hiding something.

I feel like things will become an issue as her past...

slowly starts to unveil.

Why did you lie?

You didn't kill...

Park Hyun Soo.

- What? - Finally,

Hong Ju decides to open...

the Pandora's Box that's been hidden for 25 years.

The storyline is unfolding very quickly.

Things will get a lot more amusing from now on.

(The preview of Episode 11 will air on TV for the first time.)

(You will find out the hidden truth behind Mouse.)

(A Q and A session with the actors)

I rarely read online comments...

when I shoot dramas.

But I constantly found myself reading them now.

Once the viewers find out the actual culprit,

I bet everyone will finally realize...

how the puzzles all fall into place.

There are lots of videos on YouTube trying to guess the culprit.

They try to guess who the Predator is...

and who Jae Hoon is.

(Kindergartener, Jae Hoon, Ba Reum)

(Is Jae Hoon Ba Reum or Yo Han?)

(The biggest question the viewers have...)

(is whether the little kid is Ba Reum or Yo Han.)

Then what am I supposed to do?

Do you want me to give birth to a murderer?

This baby is Han Seo Joon's child!

(The DNA test results say there's a 99.9 percent chance...)

(that the baby will be born as a psychopath.)

I'm going to have this baby.

I'm going to have this baby...

and prove that Dr. Lee was wrong.

(Another kid is born with a psychopath gene.)

You were wrong,

doctor.

(25 years later, Sung Ji Eun claims that the DNA test was wrong.)

Are you okay?

I'm okay.

(Is Jae Hoon Ba Reum or Yo Han?)

How can I tell you when I don't even know myself?

I'm not sure.

I very much enjoy Seung Gi's acting.

I support him.

Should I pretend like I don't know? What should I do?

I bet the viewers are really curious.

That's how curious I was while reading the script.

So I'm sure the viewers feel the same way.

I personally think Yo Han is Jae Hoon.

But who knows?

If I think about it in the viewers' perspective,

it could also be Ba Reum.

But it could also be Yo Han.

(The culprit is P.O.)

(I think Detective Shin is the psychopath.)

If my character turns out to be a psychopath,

no one will be able to trust anyone in this drama.

I just want to be a detective that does his best...

to support Detective Ko.

You can rest assured. Bong Yi isn't a psychopath.

(Most memorable guess from a viewer?)

Someone thought Yo Han was my little brother.

Who hugs their little brother from the back like that?

(Hong Ju and Yo Han are obviously a couple.)

(What is the meaning of the title?)

"Mouse" refers to lab rats in the drama.

It's like how we do experiments on lab rats.

I think it's referring to lab rats because that's what...

represents the drama.

But whenever I search "Mouse" on the web,

it shows me a computer mouse.

I'm still curious to find out why the drama is called Mouse.

It's the most important tool...

to do experiments regarding brain transplants.

Doctors do experiments and practice on lab rats,

and it's also the most important theme.

But I also thought it might have something to do with how...

people judge others and gossip using their mouths.

I also thought it might have something to do with that.

(What do you think is the best ending?)

For the first time in my life,

I read the ending when I read this script.

I got so curious and started from the back.

The writer surprises me every time I read a new script.

The writer really knows how to make someone...

look forward to the following week.

I get impressed every time I read a new script.

The ending is always fun.

The biggest surprise was the ending of Episode Four.

When Ba Reum appears with crutches.

The viewers probably all thought it'd be a different culprit,

but when Ba Reum suddenly showed up on screen,

I'm sure many people felt extremely lost.

(Is Ba Reum the predator?)

(The last scene of Episode 4 left many people feeling confused.)

The real shocker is in Episode Six...

when the drama ends as Ba Reum kills the bird.

That scene played a crucial role in showing...

the sudden twist of the overall storyline.

The guy who killed the bird...

I considered the bird...

as a family member.

I didn't forget about the bird, you guys.

My character just thinks the bird flew away.

I wouldn't call this my favourite, but it really broke my heart.

Moo Chi's older brother gets killed by the predator,

and it gets aired live on TV.

Moo Chi's acting was unbelievable,

and the ending was also...

very sad for Hong Ju as well...

because the show she was in charge of had to end that way.

So I personally think the ending of Episode Five was very memorable.

He not only lost his parents,

but he also lost his brother, and that was very hard to accept.

After shooting that scene, I was totally exhausted.

The emotions I felt were hard to bear with.

(What kind of ending do you hope for?)

I think it'd be nice to see...

Moo Chi and Bong Yi finally become happy for once.

I'll just have to do my best...

and play my part to help them become happy.

I don't think evil will win.

In the end, I think good will win.

But I also don't think winning or losing matters.

So many people died...

and got hurt in the process.

It's very complicated,

and I think the ending will be just as complicated.

I hope all the psychopaths will die,

and I hope Hong Ju will be able to put her past behind her.

I also hope Moo Chi will let go of his resentment...

and just become a normal detective who catches bad guys.

I just hope all the characters who got hurt in this drama...

will eventually become happy.

Regardless of all the psychopaths and unfortunate incidents,

what matters is how we endure and continue to live our lives.

I think that's the kind of message the writer wants to spread.

I think it's about how all the characters including Moo Chi,

Ba Reum, Hong Ju, and Bong Yi...

endure life and accept it, and continue to live.

I think that's the message and the meaning behind it all.

Mouse is a tragedy.

I think it'll be a tragedy with a purpose.

I think it's only right to make it a tragedy.

Was that too big a spoiler?

(Now this is the real stuff! The sneak preview of Episode 11.)

This stop is Bukbu Police Station.

The next stop is Daok High School.

Please exit carefully...

What do I do?

Even if I turn myself in again, they'll treat me like a lunatic.

No. I should still turn myself in.

So? Will you turn yourself in?

- What? - Do you plan to turn yourself in,

Jung Ba Reum?

- Sir. Are you okay? - Yes.

This isn't my phone.

Who are you?

Do you want to know why Woo Hyung Chul's body disappeared?

Who are you?

Let's discuss the details in person. But keep this in mind.

Absolutely no one may know any of this.

No one involved with your brain surgery or even your aunt.

Can you promise me?

Brain surgery? Aunt?

He knows everything about me.

Who is he?

Where should I go?

You're from the bus stop.

(Daniel Lee)

("Korean Adoptee Daniel Lee")

("Police Conclude Daniel Lee was Murdered")

Dr. Daniel Lee?

But you're dead. Sung Yo Han killed you.

I'm sure there's something else you would want to know more.

Where Woo Hyung Chul's body disappeared to.

Then... Did you remove...

I'm sure I saw him get on a boat...

to leave the country.

Did you see his face?

No, but I saw him from behind. His clothes and shoes...

What if someone with a similar build pretended to be him...

and got caught on camera on purpose?

- Then... - I'm sure he did get on that boat.

With someone else.

Of course. He is probably fish bait and gone by now.

I see.

But...who...

Let me get to why I asked you to meet.

How did it feel...

when you killed Woo Hyung Chul?

It... It was a mistake.

He tried to kill me.

- It was self-defence. - Be a little more honest.

When you snuffed the life out of him,

you probably felt an ecstasy you never imagined.

Unfortunately, the murderer Sung Yo Han's brain...

has been encroaching on your brain.

It is still doing so now.

Eventually, your brain will be completely consumed...

by Sung Yo Han's brain.

What do you think will happen?

Murder is an addiction.

By murdering Woo Hyung Chul, your murdering addiction...

suppressed in your brain probably awoke.

The switch was turned on.

- A switch? - As time passes,

that urge will get stronger.

You won't be able to stop...

no matter how strong your will may be.

What if you redirect your murderous instincts?

Thank you, viewers for loving the drama Mouse.

Thank you so much.

We'll do our best to film Mouse well until the end.

Please keep watching.

Let's go, Mouse. Who is the real killer?

Please tune in and keep watching. Thank you.

This is Sung Yo Han.

Please keep watching Mouse until the end.

Han Seo Joon is just a role.

So please don't be too scared of me. Thank you.

You haven't seen Hong Ju's story yet.

It's important not to miss a single episode.

I hope you enjoy it.

Viewers of Mouse,

thank you so much for watching.

I love you.

Please join us until the end.

I love you.

There are many storylines that are thrilling,

cruel, and tough.

It may be slightly uncomfortable,

Please watch how these characters survive those horrendous cases...

and how they strive to laugh as they go on...

with their lives.

Your passionate support...

and your deductions as you watch...

have been a great source of strength and makes filming fun.

We will work even harder so that we don't ruin this fun...

and will bring you even more fun going forward.

You won't be disappointed. Thank you.

Kang Duk Soo, the child molester who was recently released,

removed his tracking anklet and fled.

What? He ran away?

Kang Duk Soo met Bong Yi.

Is it raining? Get me out of here!

I have to get out of here!

He lives in the same neighbourhood as Bong Yi?

Hide well

It's time for hide-and-seek.

(Mouse)