Original subtitles

2 [Erin] Oh! Oh, my God!

[screaming]

[Erin] Oh, my God, he's been shot!

He's been shot!

[screaming continues]

What did he do? What did he do?

He's been shot!

[panicked clamouring]

[Joe] Get down! Stop!

- Stop! - [breathing weakly]

[theme music playing]

Stop!

- Hands in the air! - [shouting]

[Liz screams]

- Whoa! - [Joe] Get out of the way!

Please! Please!

Please.

I'm sorry.

I'm sorry.

[Billy] Wait, wait.

It's okay.

He... He's okay.

I... I... 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.

[panting]

Please, Joe.

Joe, mate. Please.

[Joe sighs]

[Arran groaning]

- [Erin] There we go. You're all right. - [Arran groans]

[indistinct chatter]

Yeah. Yeah.

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?

[Saj] 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.

[NPAS] November-Charlie-one.

They cannot fly alongside an active shooter

for obvious reasons. Out.

You're in charge until further notice.

Do not mess it up.

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?

[foreboding music plays]

[Billy] I knew we had an un-booked cabin

and 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 the day in London.

We would have gone to see a show.

Jersey Boys.

- Oh, come on. - I swear. It's true.

[Yas] Billy.

I swear, Yas.

[Liz] So, why didn't he come out

when this all first started?

Or when we left Motherwell?

Or when he hit a goods train?

Or when we found out--

That the person who installed the 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 judged them at all.

Not like you're judging him now.

Oh, so this is about us?

I came over here four years ago 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--

[Sophie] But 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. - [Joe] All right.

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.

Know anything about that?

- No. - That could be anyone's.

People bring them onboard every week in season.

Hunting, shooting, as long as

they're locked away and they have a permit--

[Rachel] 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.

Am I under arrest?

No, this is...

conversation.

[sighs]

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, certainly did.

It's not 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.

[door opening]

Ma'am.

Come on. You need me out there.

I mean, all this is 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?

[Nicola] I don't care if you or anyone else likes me, Abby,

or values 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 communication

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.

[tense music plays]

We've got a match.

[Saj] Yeah?

[Tobi] Caleb Mahmoud.

- Iranian? - Syrian.

Asylum application still pending.

Er, any red flags?

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.

[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.

Do you know what, Pev, you're the last person

I'd call at half-past midnight, okay?

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?

[Arran breathing heavily]

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 gonna shoot.

[Joe] Only if he had pulled a gun out first.

How long you been seeing him?

- What? - How long?

I don't know.

Four months.

- Tomorrow. - [Liz] So...

So, you hardly know him?

He could've been playing you just to get close

to someone who works on the train.

Don't you put that down.

[grunts]

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

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

Well, I think he had the last of it.

You... You shouldn't use alcohol on a wound.

It... It can damage the tissue.

Stop it healing.

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

- I was. - [Joe] Yeah?

Well, keep him alive.

Abby, you there?

- [Joe] Abby. - Guys.

Er, is that Joseph?

[Saj] Er, 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's pretty serious. He needs proper medical attention.

Is Abby there?

Yeah, what about the minister?

[Joe] 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. It was an accident.

Yeah, who fired the shot though?

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

But look, I, erm...

I need you to do something for me, Joseph.

[Hud] 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.

- All authorised at the highest level. - [Hud] 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.

[knocking on door]

Need a union rep?

[Nicola] Er, you left the union years ago.

Yeah, well, you can't interview--

It's a conversation.

What do you want me to do, kid?

Er...

Stop the train, Pev.

- For you. - Cheers.

[Paul] Yeah, yeah, yeah...

[door beeps]

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

- No? - No.

So, you don't recognise this?

Did you write that, Abby?

Shit.

Yeah.

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

Mashhad, ma'am.

That is part of the attack program 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.

[tense music plays]

[sighs]

[device beeping]

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.

[Mouse] Why have you still got that gun?

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.

[sighs]

Still here, then.

Following her orders, not yours.

So, what are you gonna do?

Okay. I found a match

for part of the train system's 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, okay?

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

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

[Rachel] Tonight hasn't been quite the career turnaround

either of us were hoping for, has it?

- What do you want? - An interview.

[Abby] Classified code gets leaked all the--

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?

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've 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've 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... Okay.

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 wanna change things.

You look around at the mess and you wanna 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,

that I was dead against it,

that I did everything I could to stop it.

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.

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?

[Nicola] 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.

Do you really believe

that her being on this train is a coincidence?

[Nicola] I don't know, Abby.

But you of all people should've 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?

[Hud] 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?

- [Nicola] Are we in? - Yeah, we're in.

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

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 gonna do anything dramatic, okay?

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

[music intensifies]

Done.

[Saj] Then... let's slow this thing down.

Here...

we...

go.

[passengers exclaim]

What was that?

[Chrissy] Are you okay?

- Yeah. - Yeah?

It's speeding up.

No. Er... erm...

Hundred-and-ten miles an hour.

They're heading into Birmingham.

[Tobi] Wait! Wait!

[Paul] It's another tripwire.

Everything you do is having the opposite effect.

Okay, okay. Look. Maybe we should try

intentionally speeding it up.

Please, please quit while you're behind.

[phone ringing]

Why are we going even faster?

This is too fast.

[Arran groans]

[phone ringing and buzzing]

[announcement] Did you really think it would be that easy?

Did you really think it would be that easy?

Did you really think it would be that easy?

Did you really think it would be that easy?

Did you really think it would be that easy?

Did you really think it would be that easy?

- [man] Sir? - I'm here.

We've seized a number of network devices.

We've found a laptop.

It seems to be running an encrypted

virtual PC in the background.

We need the admin password to expose it

without triggering a disk wipe.

This...

And that is?

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

Because if you don't,

you look like an awful lot like someone

with something to hide.

[automated voice] Stop CPR. Analysing.

Stand back! Stand back!

Press the flashing shock button.

- [panting] - [machine beeps]

Start CPR.

Come on! Come on!

[automated voice] Stop CPR. Analysing.

[Arran gasps heavily]

[Fraser] Listen, it isn't just him.

We're all gonna die

if we don't do something about it.

Maybe let's put that down, hey 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.

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? - [Zed] It's bypassed Birmingham,

it's now travelling on the Chiltern Main Line.

We seem to be looking at High Wycombe,

King's Sutton,

and then London Marylebone is the end of the line.

We need contact, Saj.

Rewind the clone sift a bit,

because that was not the right interface--

Rewind?

It is almost 04:30 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?

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 go 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 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 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 gonna get passed by health and safety.

Look, we would be fools to try this.

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

Okay.

This is not up for debate.

I've done what I can, 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. - All right.

Okay, that's four then.

[Billy] Yeah.

Well, Jersey Boys doesn't get a vote.

- [Billy] Typical. - Democracy is democracy.

Screw democracy.

Oh, is that right?

All right. All of those if favour,

raise your hand.

Look, I'm sorry, Chrissy.

- For what? - For shouting before.

You'll never need to apologise to me.

Well, that's good to know

'cause if you don't raise your hand,

I'm gonna do it again.

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

and I'm not gonna stop now.

- I thought you quit. - Not being me.

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 have any idea the amount of hours

I've worked in the past few months?

[sighs]

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?

[tense music plays]

What?

[scoffs]

What? What are you gonna do?

[grunting]

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

[yelling]

I'm gonna go and help them, okay?

I'll just be out here.

[Arran] Don't leave me.

Please.

Hey. The helicopter feed just cut off.

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

We have lost the feed. Over.

[Saj] Alpha-Lima-Seven.

How is another train moving?

[tense music plays]

[sighs]

Hey! Hey!

[passengers screaming]

[Joe] Is everyone okay?

Right, we're nearly there, come on!

[Joe] Argh!

I think it's this one.

I think.

If we cut it, we should detach.

- Think? - Yes. I just don't know.

- Okay. We doing this? - Yeah.

This is my last plea for sanity.

Wait, wait. Everyone hold onto something, all right?

Okay.

Go.

[creaking sound]

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!

[phone ringing]

[knocking on door]

Ma'am, sorry to come in here like this

but there appears to be another moving train, again,

and it's moving towards ours.

Close the door, please.

What I'm about to say--

- 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.

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'd be no record of what's about to happen.

Saj, you had your chance.

I wish you'd taken it.

[Hud] 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.

[Chrissy] What about the wheelchair ramp?

About time it was used for something.

[sighs]

[rattling]

- [Joe] You ready? - [Billy] Yeah.

Three, two, one.

For God's sake!

[metal clanging]

It's not working.

Come on!

[Billy shouting]

[passengers screaming]

You're all right, you all right?

- Yeah. Okay. - Okay.

Where's Fraser?

- What? - Where is Fraser?

Fraser!

He's not in his cabin.

And the toilet's empty.

[Rachel] He's not gonna be over there.

If he is, it's not on us.

[chatter]

Hello! Are you there?

Jesus, mate. What are you doing?

Why'd you come back here?

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.

He's here.

I think he's had a heart attack.

No, no.

I can't move him on my own.

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

[Sophie yelps]

You stay here with him, yeah?

[Chrissy] No!

I can't not. Remember?

[Rachel] No!

What? You bloody idiots.

Fraser. Fraser, are you all right? You're okay?

Let's take him up.

We're gonna get you up, okay? You hear me?

Three, two, one.

[Sophie] You're okay.

Three, two, one,

there we go.

There we go.

There we go. Go on, up you get.

There we go.

Go on, let's get out, this way!

[Nicola] How long until King's Sutton?

Two minutes.

[Leon] Can that be moved, ma'am?

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

Hey. What are you doing?

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

- I know how to stop it. - Wait.

[Abby] 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 crypto authentification 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 sat phone 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--

- That is not mine! - [Hud] 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 just...

I just like to see how things work.

I...

[Abby] Ma'am?

[Nicola] Oh, God.

[Fraser breathing heavily]

[Joe] Nearly there, mate, come on. Nearly there.

You got this, you got this.

[metal creaking]

[Paul] It's switched lines again.

[sighs]

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

It isn't going east to Bicester, it's going south, towards Oxford.

[phone ringing]

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 anymore

because we know exactly what to do, okay?

[Nicola] 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! Hurry up!

- Come on! - [passengers shouting]

I've got you.

[overlapping chatter]

It's coming apart!

[Liz] Oh, God!

- What? - Look, it's split apart.

Tell me you are in one of the carriages

towards the back of the train, Minister.

[Liz] I am.

But what about the others?

[theme music playing]