Original subtitles

Discovered in 1869 by Friedrich Miescher,

deoxyribonucleic acid, or DNA,

is the very essence of who we are.

99.5% of all human genetic makeup is the same.

But hidden within that 0.5% lies our unique genetic code.

Now, what would happen if we could see that code...

understand it?

Yes?

I didn�t disturb you by any chance?

I�m sorry. I�m on my way.

Your dinner�s in the dog.

W-- We don�t have a dog.

I�ll see you later.

Okay.

All right, bye. Bye.

Well, if you do it every...

Listen to what I�m telling you.

I don�t know.

Mum. Mum.

Lynda�s not home yet.

-What do you mean? -Where is she?

I don�t know.

I didn�t know what to do. I couldn�t leave Becky, could I?

Okay, I�ll go look.

-You stay with your mum. -Okay.

Come on, love. Let�s go back inside.

Come on.

Lynda?!

Lynda!

Lynda!

Good morning. It�s 7:00 on Tuesday,

the 22nd of November.

With the headlines this morning...

What time did you get back last night?

Oh, uh, not so late.

I fed Lizzie at 3:00...I think.

I extracted some DNA from the seal myoglobin gene.

-Really? -Put it on some gel,

ran electricity through it.

You�d have love it, Sarah.

Bright pink bands like bracelets!

-Wow. -Have you seen my notebook?

"And how was your night, Sue?"

Oh, not so bad.

-I�m sorry, darling.

This work I�m doing, I get a bit carried away.

I�ll be home early tonight.

-Cubs� honor? -Cubs� honor.

-Under the cushion.

Oh.

What would I do without you?

Sleep even less probably.

Bye, girls.

Traffic is at a standstill

-until the road is cleared...

...and is impacting all local travel.

- Is it her? -We think so.

Just over here.

Geoff, forensics?

Yeah, they just got here, sir.

-Pathologist is on the way. -Right.

-She�s called Lynda Mann. -Yes.

Teenager, reported missing just after midnight.

-When was she found? -Half 7:00 this morning.

Ambulance driver on his way to work.

14? 15?

Have her parents been told?

-I was about to, but... -No, no. I�ll do it.

Where do they live?

Couple of hundred yards.

Oh, yeah.

Right, the whole area, every blade of grass.

As many men as you need.

Let�s get going with a house-to-house.

Yes, boss.

Where does the Black Pad come out?

King Edward Avenue, sir.

King Edward Avenue, Forest Road, Desford Road --

That�s how she would have got here

and how the killer would have made his escape.

Start there.

Yes, sir.

Someone must have seen something.

Detective Chief Superintendent David Baker.

Detective Constable Kholi, W.P.C. Freeman.

Can we come in for a minute?

Thank you.

Uh, can I sit down?

I�m sorry to have to tell you that we found Lynda.

It�s the worst possible news I could tell you, I�m afraid.

-I�m very sorry. - No.

-Don�t say that. -I�m really sorry.

No! Don�t say that, please.

Please don�t say that!

I�m very sorry.

Where was she?

I�ll get into the details later. I�ll tell you.

No.

No, go away. Go away!

I don�t want you here. Go away.

So, what has DNA got to do with seal meat?

- Eww. -Well, I�ll tell you what --

lovely myoglobin.

Now, we�ve located the gene that makes myoglobin --

developed and adapted over millions of years.

Seals have the myoglobin gene.

Mice have the myoglobin gene.

Humans have the myoglobin gene.

Within the DNA sequence of the myoglobin gene,

we�ve discovered a kind of stutter --

a repetition of certain letters.

So, let�s say the DNA sequence

was "Mary had a little lamb," for example.

Your "Mary had a little lamb"

would read, "Mary had a -- a -- a little lamb,"

and that�s the stutter that makes you you.

And your stutter might read,

"Mary had a -- a -- a -- a -- a --

a -- a -- a -- a little lamb."

But it�s that stutter that makes you unique.

Hmm.

We�ve been cutting up the DNA

into smaller and smaller pieces using enzymes...

in the hope of getting a closer look at this stutter.

Ladies and gentlemen, this is Vicky Wilson.

Alec�s long-suffering lab technician.

Uh-uh-uh!

Senior long-suffering lab technician, if you don�t mind.

Vicky, would you mind showing these first-year students

-something of what we do? -As a matter of fact, Alec --

I just need to have a quick look.

Excuse me.

These small vials of colorless...

Well, come on. Keep up.

These small vials of colorless liquid

have DNA, plus enzymes, in them.

And over there is where we do the radioactive work,

trying not to get ourselves irradiated --

or at least I try not to.

Alec, he likes to bend some of the laboratory protocol,

including tidying up and not using other people�s apparatus.

And through that door is the orgasmatron,

as the men in this department so wittily insist on calling it.

It�s the darkroom where all the magic is revealed.

Or not. Take a look.

As you can see, the stuttered DNA hasn�t properly separated.

If we�d isolated the whole sentence

"Mary had a little lamb," we�d see a long smear on the gel.

Instead, in these brief smudges,

we just get a jumble of overlapping sentences --

sadly, currently completely indecipherable.

Still...

every failure leads to success...

so they say.

I�ll see you all next week.

That�s code for "please, will you leave now?"

I�ll take that.

I was hoping the enzymes would cut the DNA more than they have.

It�s just bloody useless.

What are we doing setting up here?

-It�s what the boss wants. -

Enderby nick�s just �round the corner.

-It doesn�t matter. - All right?

Yeah.

-You won�t believe this. -What?

There�s just one bog between the lot of us and no running water.

Kholi, we haven�t got all day.

Sorry, sir.

-Where do you want this, lads? - Over here.

Just over here. Thanks, Geoff.

Lynda was...

...lovely.

She was a very happy girl.

Um...

-I don�t know what else. -That�s good.

Please...

Please, if you�ve got any information,

-then let the police know...

...�cause we need to get the man that did this.

- Hi, Daddy. -Hello.

This is in Narborough.

What�s happened?

She was only 15.

...please come forward.

At 7:30, Lynda went to a nearby neighbor�s,

Mrs. Fenchurch in Docton Close, for a babysitting job,

but one of the family was unwell, so she wasn�t needed.

She left, and we think she decided to meet a friend

over in Enderby, just under a mile away.

But she didn�t make it.

Her body was found here,

halfway along the cut-through -- the Black Pad.

But why head down the Black Pad

if it�s not on the way to Enderby?

What if she knew the bloke who attacked her?

Where does that take us?

Well, they agreed to meet up,

and he suggested they go down the lane.

Lynda�s parents say she didn�t have a boyfriend.

Well, we�re not all like you -- goody-bloody-two-shoes.

It has to have been a random.

Young girl on her own walking by.

Bloke sees her, grabs her...

All right, enough.

Lynda Mann.

15 years old.

Raped and strangled with her own scarf

400 yards from her own front door.

That�s what we�ve got here.

So what are we doing here in an old cricket pavilion?

One toilet, leaking roof.

How bloody inconvenient.

We are here because I want the villagers to know we�re here.

We�re here because I want Lynda�s family

to know we�re here. And the killer -- He�s a local.

I�m certain of it.

He�s going to see us,

and he�s going to know that we�re not gonna go away

until we�ve got him.

Right?

-Yes, boss. -Yes, sir.

Right. Get on with it.

There are now more than 100 officers working on the inquiry.

Meanwhile, Lynda�s mother has urged witnesses to come forward.

Just go to the police if you or anybody

saw anything at all.

What sort of a girl was Lynda?

- She were very quiet. -You�re with me.

She did a lot of homework studying for CSEs and O levels.

She babysat for local people with children,

and she loved all the children.

I�m sorry to disturb you.

-It�s okay. -D.I. Madden, Enderby Police.

We�re investigating the murder of Lynda Mann.

You may have heard about the murder.

So, what time did you leave the pub, Mr. Hopkirk?

Oh, the darts match finished around 10:00.

I got home soon after that.

My wife were here. She�ll tell you.

I�m sure we can get all that checked out.

Me son, Gavin.

You all right?

These are police officers, Gav.

Inquiring about Lynda�s murder.

- Did you know Lynda? -No.

How old are you, Gavin?

He�s only 14.

-You look much older.

A lot of people say that, don�t they, son?

Yeah.

-Thanks very much. -Thank you.

-No problem. -See you later.

See ya.

If that girl was Lynda,

then she was almost certainly killed before midnight.

When she left her home at 7:00 on Monday evening,

she went to a friend�s home just 100 yards away.

She then said she was going to...

Are you not going home?

Shall I stay?

Don�t you have a gig to go to?

The Smiths.

It�s a new band from Manchester.

Make sure you don�t miss the last bus home.

Oh, yes, Dad.

They think he�s a local.

See you on Monday.

- Alec? -Yes.

Have you been here all night?

-Oh. - Sorry, Alec.

Too bright for you?

Sorry.

-I should have called.

How are the children? Where are the children?

Your mum.

I needed to come in anyway.

Sort some things out before I start back.

The computer science department

is gonna be quite a contrast to changing nappies.

What�s this?

Uh, well, we can cut the DNA into fragments

where the stutters are.

I just can�t find a way of reading them.

You mean you know they�re there? You just can�t see them?

It�s like I�m reaching into the dark,

not knowing what I�m going to find.

-It�s just... -Not unlike living with you.

I need to start again.

Make a new DNA probe to light up the stutters.

Hello. I�m Sue Jeffreys.

You may have heard of my husband.

I�m sorry.

I...

-Tea. -Mm.

Your mum blames your dad.

What? Genetic inheritance, you mean?

No. It was his idea to buy you that.

-Ah. -How old were you?

8.

Most normal little boys were looking up at cosmonauts

and predicting who was gonna land on the moon.

What were you doing?

Looking the other way,

trying to work out what was happening inside.

We told you all to bugger off.

Leicestershire�s finest.

Oh. Sorry, sir.

Uh, we gave the lads a half day.

-as it�s Christmas Eve. -That�s all right, Alan.

Are we winning?

We�re doing our best, sir.

Well, it�s all very cozy, I must say.

How many statements to date?

At the last count, 3,000, 3,500.

Which has resulted in 4,000 lines of inquiry,

which we�re inputting into these computers.

And how much is that lot costing me?

It�s invaluable, sir.

It saves buggering about with these index cards.

You know, you�ve got more staff and equipment

than I have at headquarters.

Your very own kingdom, David.

But not a single suspect.

Well, not yet.

Well, is there any good news?

Well, we have had a breakthrough, sir.

The high sperm count of the killer

shows us that it�s a man under the age of 30.

Well, that narrows the field a bit, doesn�t it?

And they found a strong PGM-plus-one factor.

It�s a secretion.

Only 10% of the male population produces it.

All right, David. One question...

...why are you so convinced the man�s local?

I mean, surely anybody could have been passing through,

sees a young girl.

Where the murder took place, sir -- Black Pad.

If you didn�t know the field behind it existed,

you�d never know it was there.

The killer knew he wasn�t gonna be disturbed.

The main road is just a few yards away.

Easy to escape.

She went down fine.

- Oh, good. - Open this one.

There.

What is it?

It�s a chemistry set.

A chemistry set?

We bought one for your father when he was your age.

I was 8, Dad.

I told him not to buy it.

You�re gonna love it. The experiments you can do.

When your dad was a boy, he brought back a dead cat

and cut it open on the dining-room table.

-Did you kill it? -No, no.

No, he was on his paper round, and it was just lying there.

-Dad. -And you picked it up?

Well I wanted to see how it worked.

Wanted to see what the heart looked like.

Yes.

And the lungs and the muscles and the blood.

Thing was, the cat had been dead for a few days,

and when he cut it open, the stink!

And do you know why your dad�s got that beard?

Splashed sulfuric acid all over his chin, he did.

Big scar under all that bush.

Yes, yes. It�s my badge of honor.

I can�t imagine there are many families

who discuss dissecting dead cats over the Christmas dinner.

Pudding, anyone?

- Hey! Hey! - Hey!

So, how�s it all going exactly?

Good. Yeah, good.

And you�re still happy at Leicester?

Yeah.

�Cause there must be others that want you.

Oxford, Harvard -- You could go anywhere.

Leicester is a great place to be.

They let me do what I like when I like.

Perfect.

Sue was telling me about your work with DNA.

-Mm. -What is it exactly?

Deoxyribonucleic acid.

And what it is, it�s basically the genetic makeup

of every living cell.

What I�m trying to do is,

I�m trying to find a way of reading it.

Don�t put that in. Dad, don�t put --

Now look.

Grandpa, don�t do that!

-Glug, glug, glug, glug. -Don�t do that!

- Hello, David. -Hi.

I just thought I�d drop by.

Do you want to come in?

Thank you.

Come on.

Go on, have a seat.

Let her go to her room.

Go on. Go to your room.

Go on.

-Would you like a drink, David? - No.

Thanks for coming to see us, David.

Not many do these days.

Most people can�t look me in the eye.

It�s like they�ve just given up on us.

Well, that�s not something I�m going to do.

You have my word on it.

What I want to know is, when are we gonna get her back?

-Kath. - We need to bury her.

We need to put her to rest.

I�ll talk to the coroner.

How are you doing, Susan?

I�m all right.

We�ve done our best for Christmas

and Rebecca and everything, but it�s not the same.

Never will be.

I just thought you�d want to know how the investigation --

-Please, just get the bastard. -[ Rebecca crying ]

I�m gonna check on her.

I want a record of every man here.

You really think he�s gonna be here, sir?

We are gathered here to say farewell

to beloved daughter Lynda Mann.

We commit her body to the hands of God

in the sure and certain hope

of the resurrection to eternal life.

Thank you, David, for getting them to release Lynda�s body.

I�m sorry it took so long.

I know we agreed to you lot filming this,

but wouldn�t you be better employed getting out there,

-looking for him? -Mr. Eastwood,

you must understand we are doing all we possibly can.

I�m sorry about Eddie.

He goes out sometimes at night

looking down the Black Pad for him.

Me too.

Shit!

-Leave it. -Aah!

-What happened? - The probe hasn�t worked.

The DNA stutter just looks like a mess of blobs.

-It�s completely unreadable. -Throwing X-rays in the bin

isn�t gonna help anything, is it?

It�s useless.

Every failure leads to success.

Isn�t that what you tell your students?

Don�t work too late.

Hey.

I�m sorry it�s so late.

The school play...

Yes, it�s in my diary. I�ll be there.

...was this afternoon, Alec.

I called...

left messages.

Do you even know that we exist?

-She did well.

Knew all her lines.

You promised her, Alec.

Sue, I�m, uh...

Still searching?

Hello, sir.

Just making sure we�ve not missed anyone.

I hate this stage of the investigation.

It�s like someone�s turned the tap off.

Well, still plenty of leads to follow.

That�s not what I�ve heard.

I�m sorry?

I admire everything you and your men are doing, David...

the time and effort you�ve all put in.

He�s in the system, sir.

He may well be. But, then again, he may not.

-What? -We�ve had five murders

this year so far, all as important as this one.

- I know.

Look, you know as well as I do

that we�re stretched to breaking point.

You can keep some of your core team,

but you�re gonna have to move back here.

-If we just had a few more... -Look.

Hard truth --

You�re as close now to catching Lynda Mann�s killer

as you were the morning her body was found, all right?

I�m sorry.

Nearly done.

I�d like to see if we can detect the stutters

in different DNA samples.

My DNA.

My mum�s DNA. My dad�s DNA.

And I see you have some other random DNA on here.

Yes. I added tobacco, cow, and some seal.

-Random, indeed.

Right.

Okay.

I�m going to try a new probe...

...extracted from the myoglobin gene.

We�ll see if that lights up the DNA fragments.

Let�s just see.

You couldn�t get that, Vicky, could you?

Hello. Genetics department.

Oh, hello. It�s Sue.

Could you put me through to Alec?

-Yes, I think he�s just... - No, he�s not.

Could you get him on the phone, please?

It�s Sue.

Tell her I�ll call her back.

No.

No.

Yes, I won�t be long.

The suitcases are packed.

You�re leaving?

Yes, Alec.

I�m leaving.

-And so, I hope, are you.

God, is there an emergency?

Worse than that. It�s a family wedding.

All right. You go. I�ll finish up.

Thank you.

Um...

if you just put the X-ray down and leave it.

And we�ll check the results on Monday morning.

Goggles.

Have a lovely weekend.

Oh, and please don�t forget the X-rays.

- Dr. Jeffreys. -Good morning.

Vicky!

-What? -Unbelievable.

The probe has lit up all the fragments.

Seal, cow, tobacco --

all clear patterns, all distinct from one another.

But see here.

You, your mother, your father.

You share these markers with your mother

and these markers with your father.

The DNA fragments have combined

to make a pattern that is unique to you.

As unique as a fingerprint.

And there it is.

In black and white for all to see.

Oh, my God.

Alec, it�s incredible.

Five past 9:00.

The 10th of September, 1984, five past 9:00.

Eureka!

-Eu-bloody-reka.

I�ve been approached to help in an immigration case.

The Home Office say the boy is here illegally,

that he forged his passport and is lying about who his mum is.

And they can prove this?

Not according to his lawyer, they can�t.

Home Office want to send the boy back to Ghana.

The lawyer read about my DNA testing in The Guardian.

She thought maybe I could help.

Well, you�ve got to.

Isn�t this exactly what your test can do?

The family have been put through hell.

It�s the Home Office culture of disbelief --

guilty until proven innocent.

They say the family�s lying, but they have no proof.

The article said your test could prove biological relationships.

That�s correct.

We can obviously take his mother�s blood,

but the father�s back in Ghana.

We can�t get a sample?

Afraid not.

Is that a problem?

Well, the boy�s DNA is a unique combination

between his father and his mother.

I would need to find a way of isolating the pattern

that belongs to the mother.

He has brothers and sisters in this country.

That might work.

I already had a blood test.

Yes, but this one, with Dr. Jeffreys� help,

is going to scientifically show

exactly who you are and who your mother is.

Inside everybody, there is a secret code.

Now, your code is different to mine,

different to everybody else�s.

I have found a way of reading that code.

What if this doesn�t work?

What if they don�t believe you?

They will send my son away forever.

Looking for a job, sir?

Nothing in the paper about Lynda Mann.

It�s coming up to the anniversary.

Well, people forget.

It�s human nature.

Kath? It�s David Baker.

Hello, David.

Thanks for doing this.

If you want to stop, just --

If it�s got to be done, it�s got to be done.

Okay.

-Hello. - Hello.

Tania Patel, Leicester Mercury.

Mrs. Eastwood, it�s been over a year now since Lynda�s murder.

How are you coping?

We miss her every day, don�t we, Ed?

That�s right.

I just -- I just don�t accept it.

Chief Superintendent Baker,

how many officers have you got working --

We�ve got enough men and women to take calls,

go through statements.

I�m absolutely convinced if we don�t find this man,

he will kill again.

I�d like to take this opportunity to make an appeal.

Someone knows him -- a wife, a friend, a colleague at work.

Think back to the night of November 21, 1983,

the coldest night of the year.

Was your boyfriend, husband, workmate

acting strangely at the time?

If you have the slightest doubt

or think you saw something at the time,

please, call the police.

-That�s it. Thank you. -Thank you.

If I could just get a photo

with Mr. and Mrs. Eastwood and the poster.

-Yes. -Do you have the poster?

I brought this poster.

-Are you all right with... -Yeah.

If you could just maybe hold it tog-- Yeah.

Today police issued a new poster

to try to jog people�s memories.

They remain convinced the killer is a local man

and someone is shielding him.

Lynda Mann...

She went to school in the area.

- Dada. -It�s been a year now.

Gavin! Your tea�s ready!

This is you. And this one is you.

Here�s your sister�s, and there is your brother.

They look like those new supermarket bar codes.

Yes.

See how the bar codes match here, here, here?

This proves that you are all related,

that you are your mother�s son.

And the judge will understand all this?

Well, I�ve sent them a very detailed explanation.

It is new, but it is absolutely categorical.

Ah.

-Thank you. -That�s for you.

-Thank you. - You�re welcome.

-And I got you that. -Oh. Thank you.

How are they doing?

Understandably, they�re very, very nervous.

Well, if you�re proved right, it�s gonna change everything...

for everyone.

Is that okay?

Do I have a choice?

Oh.

Give me that. Good luck.

Oh.

Shall I go and tell them?

They have accepted my findings.

So I can take my boy home?

Yes. Yes, you can.

-Yes, Mama.

I�m off!

-No later than 7:00. -All right. See you, Mum.

-We�re all going out, remember. -Okay.

Yes?

What have we got?

Dawn Ashworth, 15.

Didn�t come home at 7:00 like she said she would.

Family were all going out. Apparently she knew that.

-Has she done a runner? -Doesn�t look like it.

She went to go see a friend over in Carlton Avenue.

Her friend wasn�t in.

Mr. and Mrs. Ashworth.

Detective Chief Superintendent David Baker.

Very sorry about this.

Apparently, Dawn was visiting a friend in Carlton Avenue

-this afternoon? - Yes.

When was the last time you saw her?

I saw her at 4:00 here.

Do you know the route she might usually take?

Mill Lane? Leicester Road? Ten Pound Lane?

We told her never to go down Ten Pound Lane, so...

Yeah, but she might have, love.

Please find her.

Please don�t worry, Mrs. Ashworth.

I�ve got every officer I can out looking for her.

We�ll leave Laura here with you. Will you excuse me?

Wake everyone up.

Why is it that paternity cases

never pay the donation fee,

but immigration cases are more than happy to oblige?

Are you going to answer that?

-Would you like me to do it?

"Yes, please, Vicky, if you wouldn�t mind."

-This one�s marked urgent. -They�re all urgent.

They�ll have to wait like everybody else.

-I�m sorry. -Alec.

Alec.

That was Sue.

Another girl�s gone missing. She wants you home.

Right.

All right, everybody!

Stop what you�re doing and go home!

All this can wait.

Sorry.

We know that Dawn went to see a friend

in Carlton Avenue.

We think so.

Have a word, will you? Okay.

...about where this girl might be?

And they should be here very, very soon.

Keep me updated. Anything you need.

- Yes, sir. -Hey.

I tell you now, they�re looking in the wrong place.

- All right, Alan? -Nothing.

Do you think it�s the same bloke?

Oh, look, let�s not get ahead of ourselves.

The only thing we know at this moment in time

is that she�s missing.

-Right. -Right.

After two days of intensive searching,

police have still failed to find missing teenager Dawn Ashworth,

who didn�t come home on Thursday evening.

Local residents already fear her disappearance

might be connected to the murder of Lynda Mann,

whose body was found only a few hundreds yards away

three years ago.