Original subtitles

Who are you, Abby?

Joe, we could spend all night talking.

You're probably the same age as me.

I know that.

The woman in the hotel, she gave me this.

I've got something. A USB.

You remind me of my dad. Oh!

I hate my dad.

We've got it! It's the Blue Blockade Group.

They're a group based out of Tehran.

But this isn't just a hack any more.

It's an act of war.

I'm not saying that it isn't them.

I'm just saying that we still don't know that it is.

I think we should hack Miller.

Are you in? Uh-huh.

Over the last few weeks, Miller has been in communication

with one person more than anyone else.

You need to speak to Downing Street, Kate.

This isn't just about cancelling next week's announcement.

Remove all traces of it, OK?

You don't think that this is connected to Mashhad?

I don't know what to think.

You're going to have to come up with a very good reason as to why

the code used in this attack happens to have been written by you.

What am I looking at? The faces.

There's someone else on the train.

What?

Stop! Put your hands in the air!

GUNSHOT

Oh, my God!

SHRIEKING

He's been shot! He's been shot!

SHRIEKING, PANTING

SHOUTING

Get down! Stop! Get down!

Stop! Hands in the air!

SHE GASPS

SHE SCREAMS

Get out of the way!

Please. Please! Please!

I'm sorry!

I'm... I'm sorry!

Wait! It's OK!

He's OK.

It's not what it looks like!

You knew he was on the train?! It's not Billy's fault.

I just didn't know what to do.

I didn't know what to do.

Please, Joe. I'm sorry. Please.

HE GROANS

There we go.

HE GROANS

You're all right.

Stay with me. Just look at me.

Nice deep breaths!

Just look at me. Look at me! Look at me, OK?

Just stay with me!

We're OK. We're OK.

HE GROANS IN PAIN

Yeah. Yeah.

This is Saj Sidhu. I need you to speak to me.

Alpha-Lima-Seven, this is November-Charlie-One.

Could you get your team back alongside the train?

We need to see what's going on in there. Over.

OVER RADIO: November-Charlie-One.

They cannot fly alongside an active shooter for obvious reasons. Out.

You are in charge until further notice.

Do not mess it up.

Hey, what are you doing, Nicola?

This is not about what I've been doing - it's about what she has.

I've known Abigail since she was a child, and she would never...

Doesn't mean you know her now. Maybe not. But he does.

He lives in her spare room, for God's sake.

How well can you ever know anyone, really?

Hey, I haven't written any... Take a seat.

Come on, you can't think that I... Sit down.

The idea that I would... What?

Pose a threat to national security? Is that incredible to you?

Really?

Even though you've done it before?

I knew we had an unbooked cabin.

I was meant to have the day off tomorrow

before doing the return leg overnight, so... What?

..I asked him if he wanted to come...

..spend a day in London. We were going to see a show.

Jersey Boys. Oh, come on!

I swear, it's true! Billy...

I swear, Yas.

So why didn't he come out when this all first started?

Or when we left Motherwell, or when we hit a goods train,

or when we found out...? That the person who installed that device

in there might still be onboard?

You think that's a good time - when you find yourself in the middle

of what might be some terrorist incident -

to say, "Hey, everyone, here's Caleb Mahmoud"?

I'm sure you wouldn't have judged him at all,

not like you're judging him now. Oh, so this is about us?

I came over here four years ago with...with my little brother.

We applied for asylum, but we still don't have leave to remain.

I can't even work.

Getting in trouble with the police is not something...

If you leave it all this time, and then charge out

talking about Jersey Boys, you can't be surprised if we have a few...

No, I have more than a few doubts.

Every single night, all I do is smile and get people what they want

and apologise for things I have absolutely no control over.

And the one time - the one time -

I break one rule and do something for me...

No. No, no.

Answer me this, straight yes or no -

did you have a satellite phone in there?

One that's still working, that you were using?

No. Yeah, right.

This was found in a cabin near yours.

Do you know anything about that?

No. That could be anyone's.

People bring them on board every week in season -

hunting, shooting. As long as they're locked away

and they have a permit... Help! We need help.

The accountant - he's losing so much blood.

All right, get him into one of the cabins.

Come on. Help carry him. Go.

Let's go.

Could you, erm...?

Could you open the door?

I don't like closed doors.

You're not in charge in here, I'm afraid.

You're not in charge anywhere.

Am I under arrest? No, this is...

..a conversation. Right.

It's just that you bringing me into the Clean Room,

like some sort of Cyber Hannibal Lecter...

Your words, not mine.

..kind of suggests that I can't leave.

Oh, of course you can leave.

You will be arrested then, though.

Let me tell you, the Greyhat Programme...

..continues to be a significant bone of contention between agencies.

Recruiting cyber criminals to tackle the growing cyber threat -

what could possibly go wrong?

I was 15. You can't hold that against me now.

Hacking into GCHQ is a serious offence at any age.

Yeah?

Well...worked pretty well for me.

Yeah, it certainly did. It's not a "punishment" I'd recognise.

Funded through university, given a job at the end of it?

No-one has worked harder.

No doubt - the NCF, Ukraine.

It's been quite the rise, hasn't it?

Not just fast-tracked, but given the keys to the kingdom.

Ma'am, come on!

You need me out there.

I mean, all this, it's a lifetime ago!

So you're different now?

Yeah, I am.

About 20 minutes ago, did you or did you not

launch a phishing attack against your own Director General?

I don't care if you or anyone else likes me, Abby...

..or values me, or even trusts me,

because I know who I am, what I am.

And I will tell you this -

never, ever take me for a fool.

Studying your communications for information that may aid me tonight

doesn't make me a threat to national security.

But you withholding that information from me,

well, might make you one.

We've got a match!

Caleb Mahmoud. Iranian?

Syrian. Asylum application still pending.

Er...any red flags? No.

Er, Zed, get hold of his caseworker.

What...?

What exactly is happening with Abby? Not now.

But... Listen. We need to focus, OK?

You can't seriously believe that Abigail's got anything

to do with this.

Do you think that I want that to be the case?

I think you are exactly where you want to be.

SAJ SCOFFS

And you're not? No!

This is what has kept me awake at night for years!

Yeah? Yeah.

All right. Well, now, you can actually do something about it.

LINE RINGS

Do you know what, Pev?

You're the last person I'd call at half-past midnight, OK?

But you are the first person I'd be calling now,

so you need to decide if you're more interested in her career

than their lives, because if you are, there's the door.

And if not, stay here and help.

And actually, that goes for everybody else.

We've got a job to do, so can we please get on with it?

We need towels. Clean towels!

Yeah. Yeah, yeah. I'll get some.

What were you...

You what, mate? ..doing with my rifle?

You see?!

I was just trying to protect everyone.

I thought he... We know.

Well, you rammed into me. I thought you were going to shoot.

Only if he'd pulled a gun out first.

How long have you been seeing him?

What? How long?

I don't know.

Four months?

Tomorrow. So...

So you hardly know him!

He could have been playing you

just to get close to someone who works on the train.

No. No, you're wrong.

I think you need to quit too.

I don't think you're the person to tell anyone

that their career is over, do you?

Don't you put that down!

You're supposed to wash out a wound, aren't you?

Well, I don't... I don't know. Have we got any vodka?

I think he had the last of it.

You shouldn't use alcohol on a wound.

It can damage the tissue, stop it healing.

I'm... I'm a nurse.

I was. Yeah?

Well, keep him alive.

Abby? Are you there? Abby? Guys!

Er... Is that Joseph? Joseph Roag?

Who's this?

Er, my name is Sajinder Sidhu.

Now, we heard a gunshot before we lost you.

Have there been any injuries?

Er, yeah, the accountant's got a stomach wound.

It looks pretty serious. He needs proper medical attention.

Is Abby there?

Yeah. What about the Minister?

Yeah. Yeah, yeah, she's fine.

As is everyone else, thank you for asking.

Er, who fired the shot? Caleb Mahmoud?

You've ID'd him?

Was Mahmoud the shooter?

No. No, no, no. It was an accident.

Yeah. Who fired the shot, though?

Er, I don't... I don't know. It wasn't clear.

Don't think anyone saw.

Well, surely the accountant must know?

Sorry, can I speak to Abby, please?

Abby's not available at the moment. What?

Yeah. She's a little bit busy.

Er, but look, I, erm...

I need you to do something for me, Joseph.

CSJIF. That was your big break here, wasn't it?

Remind me what that stands for.

Cyber Security Joint Intelligence Force.

Right up your street, I should think -

hacking enemy state infrastructure,

"rolling out the Ambassador's reception" and all that.

All authorised at the highest level. Indeed.

And this attack tonight -

it's straight out of their playbook, wouldn't you say?

So what?! Saj was part of that as well.

Why don't you haul him in here?

Saj was the one who traced tonight's hack to you.

KNOCK ON DOOR

DOOR BEEPS, OPENS

Hey. You need a union rep?

Er, you left the union years ago.

Yeah, well, you can't interview her. It's a conversation.

What do you want me to do, kid?

Er...

..stop the train, Pev.

For you. Cheers.

Yeah, yeah, yeah!

ABBY SIGHS

Look, I am not responsible for the code used tonight.

No? No!

So you don't recognise this?

Did you write that, Abby?

Ye...

Yeah.

Would you like to state exactly what you wrote it for?

Mashhad, ma'am.

That is part of the attack programme for Operation Mashhad?

Yeah.

Now, as you know, I'm not a technical fella,

so I want you to answer the following question

in the simplest possible terms.

What was the aim of Operation Mashhad?

To hack a train.

JOE: Yeah, I'm at the device.

Right, I need you to plug that phone back into it.

Why? What exactly do you want to do?

Just do it, please.

Why have you still got that gun?

BEEPING

They've switched lines again.

They're not going towards Leicester now,

they're going towards Burton-on-Trent.

Why? They could get back on the West Coast Mainline at Tamworth

or switch at Birmingham.

Still here, then? Yeah, following her orders, not yours.

So what are you going to do?

OK. I found a match for part of the train systems attack script

in the code library - enough to speed up the clone sift.

So whatever they've done to hide the real SBC,

we can at least narrow down the data to focus on the vulnerability

that they're targeting. And if that works,

we should be able to isolate the real SBC. And hit the brakes.

Abby was really clear that nothing should be done

without being tested in the sandbox first. Yes, she was.

But she is no longer here, OK?

And if we do nothing, that train could come off the line

right in the centre of Birmingham within the next few minutes.

Tonight hasn't been quite the career turnaround

either of us were hoping for, has it?

It could be, though.

There are many versions of all this, for both of us.

And we can either sit back and let someone else write them, or...

What do you want? An interview.

Classified code gets leaked all...

It's more than just code, though, isn't it?

You were technical lead of Operation Mashhad,

an attempt to remotely take control of an Iranian rail convoy

believed to be transporting nuclear material.

And you succeeded. Yeah, for about two whole minutes!

So you wanted to go one better?

I didn't have anything to do with the train side of things. That...

That was my predecessor.

Ma'am, you need to get me back up there and... What?

What have you accomplished so far?

You've lost control of the entire rail network

and made a new mum a widow. Hud, please.

And what have you people done,

bar setting fire to the train and dragging me in here?

Actually, we've just detained two individuals from the incident

at Glasgow Central, so... What did they say?

All claiming to be hired hands,

with no knowledge of the objective or scale of the attack -

approached by social media

and offered large sums for specific tasks.

By who?

The account is fake.

So if you know, if you were approached

and you have accepted money, then believe me, now -

whilst most of the people on that train are still alive -

is definitely the time to say.

Look, I was worried about Mashhad.

I said that to you, that this might have been some sort of revenge.

But I don't think it is.

I think Iran is being used by somebody who knows about all this

to make it seem like it's them.

Come on. We're getting nowhere here. No, but...

OK, we could.

Ma'am, what were you talking about in those emails to the Minister?

Why not mention that you were in constant contact with her?

Nicola, she is not interviewing... Hey!

No-one's interviewing anyone. It's just a conversation, all right?

You go into it - everyone does - because...

..you want to change things.

You look around at the mess, and...

..you want to fix it.

But when you're in it,

you realise there's just so many vested interests.

I mean, it's obvious - of course it is -

but until you're in it, you don't realise that

all of the power is with them, not you.

I'm sorry, I don't really...

Just be clear, will you, that I was dead against it?

That I did everything I could to stop it.

I want you to be clear about that.

I want you to report the facts accurately.

What facts?

UK Rail - that is all the track, lights, signals, infrastructure -

was about to be taken back out of the public sector,

broken up and sold.

To who? I was reliably informed that none of the favoured bidders

are UK-based, and one of them was a French company

you may now be familiar with, called VoyaRapide.

You see, this is why I needed to know!

These are highly confidential discussions.

If I were seen to be the source of a leak...

I would never... I have spent day and night raising my concerns

as to the potential security risk of selling off critical infrastructure

in that way, of having no idea who the ultimate owner of it might be.

But Draycott was in favour?

What do you think?

She's the Transport Secretary.

She wants to be Home Secretary.

She probably wants to be Prime Minister.

She's desperate to drive things through and move on.

Well, that's not going to happen now. Wouldn't think so, would you?

Do you really believe that her being on this train is a coincidence?

I don't know, Abby.

But you of all people should have known

not to see deep state conspiracies all around you.

Just because we walk in the shadows

doesn't mean we're there to do people harm.

We're there to keep them safe.

So why have you stopped believing that of me?

We don't operate on belief. We operate on evidence.

What are you doing in my flat?

Hoping we don't find any.

Right, is that better?

HE GROANS

It's OK. We're OK.

PHONE RINGS

Are we in?

Yeah. We're in.

Tobi's just writing a counter attack for the cloning programme

so that it doesn't trigger the same response as last time.

How long will that take?

Ten minutes, but I'm aiming for two.

Can we access the brakes from here?

We can. But it doesn't mean it's a good idea.

Yeah, I'm not going to do anything dramatic, OK?

I'm just going to bring the speed of the train down very slowly.

Been looking for you.

Always wanted to try it, you know, the first class experience.

Aye.

Well, what do you reckon?

I think you'd get a better night's sleep strapped to the roof.

THEY LAUGH

I've been carrying it around since Motherwell.

You know, all night, I've been saying to myself,

"You can get through this.

"You've been through hell before and made it out the other side."

But the thing that pulled me out,

it was Kyle...

..and my sisters.

I wasn't alone then.

I don't... I don't know if I can...

Problem solved.

That was disgusting, by the way.

Done.

HE CHUCKLES

Then....

..let's slow this thing down.

Here...we...

..go.

GASPS

What was that?!

Are you OK? Yeah. Yeah? Yeah.

It...

It's speeding up.

No.

Erm...

110 miles an hour!

No!

They're heading into Birmingham.

Wait, wait!

It's another trip wire.

Everything you do is having the opposite effect.

OK. OK. Look, maybe we should try intentionally speeding it up.

Please, please quit while you're behind!

PHONE RINGS

HE GROANS It's OK! It's OK. You are OK.

Why are we going even faster? This is too fast!

RINGING CONTINUES

MALE VOICE: Did you really think it would be that easy?

FEMALE VOICE: Did you really think it would be that easy?

BOTH VOICES: Did you really think it would be that easy?

VOICES DISTORT, CONTINUE

Sir? I'm here.

We've seized a number of networked devices.

We've found a laptop that seems to be running an encrypted virtual PC

in the background.

We'd need the admin password to expose it

without triggering a disc wipe.

And that is?

I have no idea. Oh, I hope you do,

because if you don't,

you look an awful lot like someone with something to hide.

PHONE RINGS, HE SIGHS

Yep, hello?

What's going on?

Yeah. There was a complication, but we are looking into it.

All right. Where is Abby?

I'm afraid that Abigail Aysgarth

had to step off this operation permanently,

so you need to listen to me. Listen, OK?

What? Because I am in charge now.

His heart's stopped!

Hello?

Hello?

They're beyond maximum speed.

DEFIBRILLATOR VOICE: Stop CPR. Analysing. Stand back!

Shock advised. Stand back!

Press the flashing shock button.

LONG BEEP

Start CPR.

Come on! Come on!

Stop CPR. Analysing.

HE GASPS

Listen, it isn't just him!

We're all going to die if we don't do something about it.

Maybe let's put that down, eh, mate?

Do you think her lot give a toss about what happens to us?

They're too busy covering their arses.

We are on our own!

So we can either sit here and wait for help, which will not happen,

or we can save ourselves!

Look, I know these trains.

This one's been tarted up a bit, but they're all the same underneath.

The power is in the locomotive. That's what's pulling us along.

And I don't think we've a chance in hell of this train

not going where the bastards that are driving it want it to go.

Look, that doesn't mean to say that we have to go along with it.

We might not be able to stop the whole train -

maybe nobody can - but we can stop half of it.

SAJ: Excuse me? Is anyone there? Are you there?

It's bypassed Birmingham.

It's now travelling on the Chiltern Main Line.

We seem to be looking at High Wycombe, Kings Sutton,

and then London Marylebone is the end of the line.

I... I don't think there is any way that we could have actually

anticipated that they'd rigged the...

Oh, "we", is it?

We need contact, Saj.

I know, ma'am. What, then?

Well, look, we just need to... rewind the clone sift a bit,

because obviously that was not the right interface, and then...

"Rewind"?

It is almost 4.30 in the morning,

and the train is getting closer and closer to London,

but you're telling me that your solution is getting further away?

Nicola!

Nicola, you have to get Abby back in here.

The code used in... It's more than the code now, Paul.

One of the laptops in her flat has an encrypted virtual PC

running in the background and she's refusing to give us the password.

Come on. There could have been anything in there.

I agree. But none of it is going to be good.

Are you seriously considering this?

Of course not! We just need to sit tight and...

What, die?

Look, is it even possible

to decouple a train while it's still moving?

Moving really, really fast!

The Mark 16 locks electronically.

There'll be decoupling switches in that office.

There are. And personally, I wouldn't rather be near

that wee machine. I don't trust it an inch.

All right, so...?

So we can access the same wiring from this carriage.

There's points in every carriage.

All we have to do is break the connection -

trick it into thinking there's something's there that isn't -

and then tidy out everything there that we can.

What, and it'll just... just come apart?

I don't know! Never been tried before.

And I'll... I'll need tools - you know, like a proper kit -

or I can't do it. There's a lot of stuff in the office.

How dangerous are we talking?

It's not going to get passed by Health and Safety.

Look, we would be fools to try this, right? That is the truth.

We're short on things that we need, and if things go wrong...

But we would be bigger fools if we just didn't do anything.

OK.

Er, this is not up for debate!

I've done what I can, but...

But he is in very serious condition.

If we do not get him off the train soon...

Yeah, I'm in.

Look, there will be a plan in motion, we just have to trust...

Me too. Right. OK, that's four, then.

Well, Jersey Boys doesn't get a vote.

Typical. Democracy is democracy.

Screw democracy!

Oh, is that right?

Er, all those in favour, raise your hand.

Look, I'm sorry, Chrissy.

For what? For shouting before.

You will never need to apologise to me.

Right, well, that's good to know,

because if you don't raise your hand, I'm going to do it again.

I've been trying to get you off this train since Motherwell,

and I'm not going to stop now.

I thought you quit. Yeah, not being me.

SAJ: Joseph? Hello?

What... What's going on in there?

Hello. Did you hear me? I said... Yes.

Yes, I heard you.

Don't worry about it, mate. We'll take it from here.

CALL DISCONNECTS

Hello?

All right, look, I can't give you a password that I haven't set.

I have to break it to you, in case you're somehow imagining

that we won't ever be able to get in there, we almost have.

Do you...? Do you have any idea the amount of hours

I've worked in the past few months, the time that I have spent here?

When I finally get home, do you really think that I jump

straight on my laptop and begin all of my secret nefarious cyber work?

PHONE CHIMES

What?

When the history of tonight is written, long after we're all gone,

I hope people realise that we would never have done what we did

if you'd just taken the opportunity you had and told the truth.

What does that mean?

What?

What?

DOOR BEEPS

What are you going to do?

This is actually very satisfying.

It won't work. It can't.

Last one.

How's it going?

I seem to have been retired longer than I thought.

I'm going to go and help them.

OK? I'll ju... I'll just be out here.

Don't leave me...please.

All right, let's get on with it, then!

THEY SCREAM

PHONE RINGS, DOOR OPENS

HE SIGHS

Hey. The helicopter feed just cut off.

Alpha-Lima-Seven, this is November-Charlie-One.

We have lost the feed. Over.

Alpha-Lima-Seven?

TRAIN STARTS ROLLING

How is another train moving?

TRAIN ROLLING

Do I really?

What?

Remind you of your dad?

A little bit, yeah.

If he'd had money.

HE LAUGHS

Whoa!

No, no, you see, I didn't always.

Try not to speak. No, I didn't...

Honestly, just... I...

I used to be something else.

Someone else.

Yeah, you...

You start off by putting it on - you know, the work...

..to fit in, to...

..to be like one of them.

They take you shooting...

..you pull the trigger...

..but you have to be the best shot.

You have to look that deer in the eye and feel nothing.

Where did I go, eh?

Where did I go?

SHE SIGHS

SHE GROANS

MUFFLED: Hey!

NORMAL: Hey!

LOUD RATTLING, SCREAMING

We're all OK! Right, we're nearly there. Come on!

HE GROANS

I think it's this one!

I think, if we cut it, we should detach.

"Think"? Yes!

I just don't know.

OK. We doing this? Yeah.

This is my last plea for sanity!

Wait. Wait! Everyone, hold on to something, all right? OK.

Go!

It's not working!

No, it's nearly there!

Just needs a wee shoogle.

Is there anything we can use to give it a whack

and help it on its way?

No! Something bigger!

All right, let's find something.

Ma'am, I am sorry to come in here like this,

but there appears to be another moving train, again,

and it's moving towards ours. Could you close the door, please?

What I'm about to say never... Nicola, Nicola...

No, they need to know. You leave, you leave.

They don't need to leave.

He has made decisions like this, and one day, he will.

What decisions?

It won't be moving for much longer.

The Heart of Britain is going to be stopped - has to be stopped -

before it reaches London.

Oh, about three hours ago, we were all on our knees

because Abby just about moved a goods train,

and now we're putting one there deliberately?

Someone has to make the decisions no-one wants to.

We don't have the luxury of pretending there are good options

when there are not. Well, we could pay the ransom.

There has been no movement from either VoyaRapide

or the French state regarding the payment of any ransom,

and there isn't going to be.

It's not what they do.

And as you know, it's not what we do.

But, what, we cause accidents?

Only if it prevents much worse ones.

You shut down the helicopter feed

so there would be no record of what's about to happen.

Saj, you had your chance. I wish you'd taken it.

There are passengers on board.

A boy!

Do you know how many people live in central London?

How many children?

Do you know what the effect will be

when something of that speed and weight derails,

ploughs into the boiler house at the end of the line?

Well, if Abby was here... Oh, Abby! "If Abby was here..."

What does that mean?

They've cracked the virtual PC.

It's full of malware that we've created,

tools we've created over the years,

the kinds of things that do not and cannot leave this building.

She may or may not have something to do with this,

but either way, she's gone.

That train does not get into London,

and we - none of us - are to blame for anything.

What about the wheelchair ramp?

About time it was used for something.

Oh!

DOOR BEEPS, OPENS

You ready? Yeah!

Three, two, one!

For God's sake!

It's not working! Come on!

YELLING

SCREAMING

You're all right! You're all right now.

You're all right.

Where's Fraser? What?

Where is Fraser?

Fraser!

Look, I am in complete agreement. SHE GASPS

If you can't make these decisions, then you shouldn't be in the job.

He's not in his cabin.

And the toilet's empty.

He's not going to be over there!

If he is, it's not on us!

THEY SCREAM

DOOR CLOSES IN STAIRWELL

PHONE RINGS

Hello? Are you there?

Jesus, mate!

What are you doing? Why did you come back here?

FRASER GROANS

Bloody hell, mate. I'd have bought you another one.

We need to get you back across, all right?

Hey. You're definitely coming back.

I'm going to get help, all right?

He's here! I think he's had a heart attack.

No, no, no! I can't move him on my own.

Don't... Don't let me fall, OK?

You stay here with him, yeah?

No! I can't not. Remember?

No!

You bloody idiots.

Fraser. Fraser, you're all right, you're OK.

Let's get this table up. We're going to get you up, OK? Do you hear me?

Three, two, one...

HE STRAINS

You're OK. Three, two...

THEY STRAIN

There we go. OK.

There we go. There we go. Come on, up you get.

There you go. Come on, let's get out. This way!

LOUD RATTLING

How long until Kings Sutton?

Two minutes.

Can that be moved, ma'am?

No, Leon. I don't believe it can.

Hey! What are you doing?

Ma'am?

Ma'am, I think I know... Stay exactly where you are!

I know how to stop it.

Wait!

What if...?

What if it's all from us?

Not just the train hack, but the antivirus too.

What if the methods, the work being used here,

are ours? What if this "Driver" is using us?

Look...

..the French covered up a data leak, right?

Showing that the CryptoAuthentification chips

they were using were vulnerable to attack.

But that doesn't mean it's the only thing that was.

If they have used the code I wrote for Mashhad,

then maybe they've used the same vulnerabilities as we did too.

The firmware in the logic control board.

Yes! And unlike the chip, that can be fixed from here.

It is patchable.

There's a CVE code for it?

Yeah.

We don't need to find the real interface for the device.

Use their satphone to update the train's systems, and...

..we're in.

Ma'am, look, I won't stay where I'm not trusted.

I'll leave tomorrow. But please, please let me do this tonight.

This doesn't change what she's done, what we know she has.

The stuff on her computer, that alone is enough for...

That is not mine! Then who else? Who else?

I don't know!

Oh, Tobi.

Tobi, Tobi!

You really are here for the toys, aren't you?

I...

I never did anything with it. Nothing bad. I...

I just like to see how things work.

I...

Ma'am?

Oh, God.

Nearly there, mate. Come on. Nearly there.

You got this. You got this.

PEV: It's switched lines again.

I've never been so relieved the train's one step ahead of us.

It isn't going east at Bicester.

It's going south towards Oxford.

PHONE RINGS

Hello? Hello, this is Liz Draycott. Are you there?

Yes.

Can you see what's happening?

Yes, we can, and you don't need to worry any more

because we know exactly what to do, OK?

Abby...

Yeah.

Minister, you just need to take this phone to the manager's office

and connect it up, and we'll do the rest.

Well, how do I do that?

What? It's coming apart!

The switch of lines just opened us up.

It's coming apart!

Come on! Quick! Hurry up!

SHOUTING CONTINUES

I've got you.

SHOUTING CONTINUES

It's coming apart! No!

SCREAMING

Oh, God!

What? Look! It split apart.

Tell me you were in one of the carriages

towards the back of the train, Minister?

I am.

But what about the others?

Are my team OK to go in?

We need you to keep everyone onboard.

If you had something to do with this,

what half would you rather be on?

I thought there was meant to be six.

Armed police! Hands in the air!

Who's gone?

OK, first things first -

any doubt that anybody had about me should absolutely remain.

Tonight's hackjacking code is mine.

It's never going to work!

None of it matters now anyway.

A decision has been taken at the highest level.

There's still six lives in there. We can't just give up on them.

A "tactical intervention" is no longer an option.

The word "hackjack" is now trending,

and your failure is about to be everyone's breakfast viewing.

JOE: It's happening! ABBY: Joe?

Backs straight against the chairs, facing away from the impact!

Will that even help? Yes.