(rain pouring) (bus rumbling, brakes hiss) (dramatic music) (machine beeps) (coughs) (bus rumbling) (coughing) (bell rings) WOMAN: Are you alright?

(thumps) Oh, my God.

(brakes squeak) Oh, God, what's wrong with him?

Oh!

(banging on door) (theme music) (car door closes) One fatality.

Parsons' best guess some kind of internal trauma.

Anything to suggest foul play?

We've got one man fleeing the scene.

Distinctive neck tattoo, tiger, maybe.

Are they saying he was involved?

More likely he just got squeamish.

(phone rings) DS Jake Hunter.

Uh, Ma'am, um, you might want this.

Pandemic's over, Will.

Dr. Parsons advised it.

Oh.

Looks like this one's just thrown his guts up, quite literally.

How does that happen?

Ah, hemorrhagic shock.

TB, maybe.

-Tuberculosis?

-Mm, it's on the rise.

Is it contagious?

Well, only through prolonged contact.

(dramatic music) Oh, have we got an ID, Elliot?

Not yet, Ma'am.

Just a phone, a bus pass, a few personal effects.

But this might interest you.

No fingerprints.

Chemically removed.

(sighs) Where's Patience?

We haven't spoken since my birthday.

That was days ago.

She'll be in touch when she's ready.

Bollocks.

I think the word you're looking for is sorry.

I'm sorry.

Not to me, to her.

(dramatic music) (footsteps receding) (birds singing) Hey.

You...you don't have to say anything, I just...here.

Thought it might come in handy.

(phone rings) Think of it as a thank-you present.

Hi, Parsons.

Oh, well, there goes that theory.

Yep.

Bye.

Fancy a trip to the mortuary?

Yes.

Test for TB was negative.

What about the blood on his shirt?

It's not human.

Bovine, I think.

Uh, did you test for zoonotic infections?

I was just in the process.

Oh, blood in the mediastinum.

That's a known symptom of inhalation anthrax.

Anthrax?

Not so fast, we need to test this.

Well, fast-track it.

I went on that bus.

No need to panic.

Anthrax in the lungs doesn't spread through human contact.

Yeah, it's caught from infected animals.

(mysterious music) Rice cake, anyone?

Look, Patience, I'm...

I'm sorry, about the party.

-I'd...I'd had a bit to drink.

-Yeah, well.

Alcohol can exacerbate negative neurocognitive traits.

So... See, I was...I was laughing at DI Metcalf, not your present.

You know, the idea of her sewing anything is... it's just funny.

Look... it was just a bit of banter.

You know, teasing, messing about.

Yeah, no, I know what banter is, DS Hunter.

I actually just don't see the point of it.

(background siren wails) The test results aren't back yet.

I need you to do some digging.

-Alright.

-Ma'am?

You might want to see this.

Uh... it's pretty grim.

(mouse clicking) (suspenseful music) (footsteps running) I did try and warn her.

-She's an animal lover.

-Ah, um... the footage from the slaughterhouse is the only thing that forensics found on the phone.

Explains the blood on his clothes.

Do we have anything that might ID him?

Uh... just the bus pass.

Alright, there's only one slaughterhouse in the area.

Do you still know that guy in the Animal and Plant Health Agency?

Trevor Willett.

Yeah, I'll give him a call.

This place needs testing.

Why have the APHA shut me down?

They need to run some tests.

What kind of tests?

Ask them.

I'm more interested in this.

They your premises?

(suspenseful music) Looks like it.

Doesn't bother you to see cows abused like that?

You try handling a half-ton of terrified beef without coercion.

Could be grounds for prosecution.

Killing animals is a messy business.

This is a messy business.

Oh, my God, that's, uh... he's, um... -An employee of yours?

Hutton, Wes Hutton.

Has he worked for you long?

Month, at most.

What happened to him?

We're still working on that.

(police siren wailing) Any update on tiger tattoo guy?

Not yet, boss.

I've requested the onboard CCTV, but the bus company are playing silly buggers.

Also, the, uh, passport and social security numbers that the slaughterhouse manager gave us for Wes Hutton, I think they might be nicked.

Look, someone called Wesley James Hutton reported his wallet stolen on his trip up here from Portsmouth to see his daughter at the university last month.

Why would a guy who works in a slaughterhouse go to this much effort to hide who he is?

Uh...I might have an answer, Ma'am.

(suspenseful music) It's the same video, just with fancy titles.

He uploaded it before he died?

Don't think so, Ma'am.

It was posted just now by a group calling themselves the Climate Defense Force.

Ring any bells?

Well, find out who they are, who our victim is.

What's the connection?

You see, the thing is, Bea, if his DNA's not... You alright?

Yeah.

I think it's something I ate.

Either that or I'm peri- menopausal.

You were saying?

Yeah, uh, if his DNA's not in the database we can't ID him from his teeth.

(mobile phone rings) Oh.

I'll leave you to it.

Oh, you might want to stay for this.

Hello, Oliver.

What's the latest?

Yeah.

Yeah?

Very interesting, thanks, I owe you one.

The slaughterhouse is clean.

He didn't catch anthrax from the cows?

No.

Must have been infected some other way.

(dramatic music) You okay?

Not you as well.

-Do you need a minute?

-(sighs) No.

What have you got?

Right, the Climate Defense Force style themselves as a civil resistance group the Home Office call them terrorists, so they've added them to the prescribed organizations list.

Oh, that's major league.

Yeah, they've abandoned non-violent protest in favor of direct action on individuals and companies that they blame for environmental degradation.

What's this got to do with our dead man on the Bootham omnibus?

Uh, I'm not sure, boss, but the CDF were blamed for an arson attack on a meat processing factory in Dalton, just on the outskirts of Leeds, five years ago.

You think they're planning something similar on our local slaughterhouse?

-It's hard to say.

When I tried to access the file on the PNC, it was restricted.

Restricted?

By who?

Regional Counter-terrorism.

Not Zara Blackwood?

Yeah, boss.

Do you know her?

We've crossed swords.

Do we have to go through Blackwood?

Well, there's press reporting on the fire because of a fatality.

-Somebody died?

-Yeah, a worker at the plant.

An activist called Jean Crick was charged with the manslaughter.

The case was heard in private, but we know she's serving 25 years to life.

That's all I've got.

(tense music) Where you going?

Where do you think?

That, that's not gonna happen, I'm afraid.

-Ma'am?

-The Dalton file has been restricted for a reason, and it's going to stay that way.

Am I allowed to know why?

National security, public interest, because I say so.

Take your pick.

-With respect, Ma'am, a man's died.

How am I supposed to investigate?

You're not.

I've, uh, given my word you're gonna cease investigating, with immediate effect.

-Sir.

-That's an order.

Can you at least reassure me that there's no ongoing threat to people in York?

That's for me to worry about, not you.

(dramatic music) (footsteps receding) (knocking on door) Learn anything useful?

Yeah.

Yeah, did you know that your facial temperature increases when you're attracted to someone?

Feeling pretty flushed myself.

(clears throat) So, why are you here?

Can I help you with something?

That thing you said about this place keeping a record of every document from every case, is... is that true?

Yeah, I...I never lie.

(footsteps clacking) (suspenseful music) It's not here.

-Where is it?

-I don't know.

I mean, it could be removed to a restricted part of the archive.

Can you access it?

No.

But you could submit a request, I'm not authorized to.

I'm off the case, thanks to Zara Blackwood, the bitch.

Is...is there any way you can... (whispers) bend the rules?

-N...ah... -Aah, forget I said it.

Well, if you've been taken off the case, then why do you want the file?

Because I can't leave a puzzle unsolved any more than you can.

(mysterious music) (phone ringing) Patience.

What...what time is it?

No, no, it's okay, it's okay.

(gasps) I thought you weren't authorized to access the file?

Oh, no, I'm not.

This is all just from other sources.

So, the Dalton factory incident report, it says that the worker who died may not have known all the fire exits in the building.

Um, it says that he's the only confirmed fatality.

Dexter James.

-Only confirmed fatality?

Well, a second worker, Roland Mitchell, has been missing since the arson attack, um, but his remains were never recovered.

-How do you know?

-Well, his mother insisted on filing a missing persons report.

Uh, I tracked down the CPS submission and asked for a court case to be held in private, but it cites public disclosure of this information could jeopardize current and future operations, place individuals at risk of harm or retribution.

Counter-terrorism must have been investigating the Climate Defense Force at the time of the attack.

Jean Crick, she's the founder of the CDF.

Um, she was a molecular biologist, but she lost her professorship when she called for direct action for the closures of meat processing plants and abattoirs.

This is brilliant work, Patience.

Uh, no, there is more, Detective Bea.

Um, this is an intake log from the Secure Evidence Unit.

412 grams of hazardous bio-agent was being stored in a lab a year after the attack.

It was found during a raid, and the lab that they found it in was said to be facilitating acts of ecological terrorism.

The CDF were cultivating anthrax to infect the meat industry.

It is probable.

(sighs) (coughs) Thank you.

(tense music) (door buzzing) (door closes) Do you recognize him, Jean?

Someone you were close to?

(distorted) I don't have time for sentiment.

We're on the brink of an environmental catastrophe.

Was he gonna carry out your orders, Jean?

Infect the slaughterhouse with anthrax, unleash your promised wave of terror on the meat industry?

Shame, he only seems to have managed to infect himself.

You're just a lackey from a morally bankrupt system.

Better a lackey than a murderer.

I never set out to kill anyone.

But you showed no concern for life when you ordered that meat factory to be burned to the ground.

I bet you'd be willing to infect people with anthrax to make your point.

It's a funny way of showing how much you care about the plight of humanity.

Don't talk to me about humanity.

(box clatters) (ominous music) (coughs, chokes) (door buzzes) (choking) (ominous crescendo) (traffic rumbling) Throat cancer.

Weeks to live at most.

And she still wouldn't ID him?

But she knows who he is.

My guess is our victim on the bus infiltrated the slaughterhouse on the CDF's behalf.

Only this time the plan was to infect it with anthrax.

But there was no anthrax at the slaughterhouse, the APHA tested.

Maybe he infected himself by accident before he could execute the plan.

We need to get a hold of a sample of the anthrax that's been held at the secure evidence unit.

Test it against the strain that killed our guy.

You've been stood down, boss.

We all have.

So, I mean, they're hardly gonna complain if we solve the case.

Look, the, um... the council finally came through.

Oh, with the name for the bus pass?

Yeah, it's... it's Roland Mitchell.

Roland Mitchell?

Well, that's the name they gave me.

Uh, 43 Lindhurst Drive, Pocklington.

That's the missing suspect from the Dalton factory fire.

Oh, do you want me to meet you there?

(phone call cuts) (dog barking) (coughs) (children chattering) (doorbell rings) -Hiya.

-Can I help you?

I'm looking for Roland Mitchell.

He's not in.

And you are...?

-Vicky Crick.

-Crick?

That's right.

I'm his sister-in-law.

Jean Crick is your sister?

What's this about?

I think you'd better invite me in.

You're sure it's him?

Roland?

I know, it's... it's a lot to process.

(loud bang) Noah, love, keep the football down.

They're a handful, aren't they, that age?

He's Jean and Roland's kid, not mine.

(mysterious music) I was gob smacked when Jean fell in love with him, even more so when she got pregnant.

She swore she'd never bring a child into a world that was on the brink of collapse.

Did Roland feel the same way?

I think being a father changed him.

He'd been talking about renouncing it all, taking Noah to live somewhere remote, away from the violence.

Hmm, that's... uh, I'm sorry, can I use your bathroom?

Yeah, it's upstairs.

(water running) (coughing) (water running) Hey!

(high tempo music) Urgh!

Aah.

Urgh.

(car engine roars) (tires squeal) Ah...aargh.

Argh, Will!

(dramatic music) (hospital machines beeping) (soft music) -How bad do I look?

-Don't be in too much of a rush to update your Tinder profile.

(coughs) -Want me to get someone?

-(coughing) No.

(phone rings) It's Baxter.

Sir?

She may have had her phone on silent, Sir.

Yeah, of course, I'll...I'll...

I'll tell her.

Understood, Sir.

(exasperated sigh) (clears throat) How did he sound?

He, uh, he wants us in his office tomorrow morning, 9 a.m. sharp.

And we're not to discuss the case any further.

Yeah.

(sniffs) What are you doing?

I just...I...

I can't lie around here feeling sorry for myself.

No, you should stay in overnight, I can pick you up in the morning.

-Just call me a cab, would you?

(soft music) For the tape, I'm showing photos from a counter-terrorist surveillance operation.

Did we capture your best side, Sam?

-No comment.

-Take your time.

You're gonna be so sick of the sound of my voice after two weeks, it'll be a blessed relief when we finally charge you with murder.

I didn't murder him.

Interview suspended.

Jeanie told me to keep an eye on him, that's why I was on the bus.

I had orders to keep Roland and the boy safe, not to kill anyone!

(dramatic music) (hands bang) Could you leave us a minute, please, Sergeant?

(door closes) Where is it?

-Where's what, Ma'am?

-Your warrant card.

Believe me, I hate to do this.

The force doesn't function if orders are disobeyed.

Ma'am.

(door opens) (door closes) -Suspended.

-What?

With immediate effect.

Can you contact that poor mother of the dead man, please?

-What, me?

-Well... better you than Blackwood.

Yeah, but can't you do it?

If they catch me interfering again, it'll be instant dismissal.

(coughs) (siren wails distantly) -Look, Sir... -Don't speak, just listen.

Now, considering the part you played in the arrest of Sam Fincher, uh, Superintendent Blackwood agrees with me that no disciplinary action is required.

Well, shouldn't the same apply to DI Metcalf, Sir?

You provided backup for a fellow officer.

She disobeyed an order.

Look, just go back to work and get your head down.

Well, am I at least allowed to know the status of the case against Fincher?

We can confirm that your dead man on the bus is Roland Mitchell.

What, the arsonist that's been on the run since the Dalton Factory fire?

-Correct.

We're working on the theory that Jean Crick gave the order from prison for Fincher to carry out the hit on him, to stop him from leaving the CDF and taking their child with him.

You know we'd be none the wiser about their relationship if it wasn't for DI Metcalf, right?

-That's enough.

-We can prove that Fincher was a member of the Climate Defense Force, and we have CCTV footage of him fleeing the scene.

It doesn't follow that he infected him.

The CDF knows how to grow anthrax.

We caught them in the act four years ago.

We've arrested Crick's sister, and either she'll crack, or Fincher will.

They're gonna help us fill in the blanks.

No, it's time to forget this case, Sergeant.

(dramatic music) Thank you for that.

Ma'am.

I'll see you later.

(fist thumps) Is there someone you'd like me to call?

To come and sit with you?

I'll, um, I'll let myself out.

I want to see him.

I'd advise you not to, Mrs. Mitchell.

I want to see my boy.

That's not him.

It's not Roland.

(sinister music) But he's...he's been positively identified.

Are you suggesting I don't know my own son, Detective?

(choking and spluttering) (thuds on floor) So... has anyone got anything they'd like to share?

Dev?

(phone rings) Uh, Patience?

Sorry, I'm... (phone continues ringing) Uh, it's no caller ID.

It might be important.

This is Patience Evans speaking.

Patience, it's Jake.

DS Hunter.

Alright, uh, Dev, I think you were gonna speak, yeah?

(door closes) Look, DI Metcalf's been suspended because of this anthrax business.

What, are you taking on the case then, DS Hunter?

What me?

No.

Then why are you calling?

(sinister music) Look, I want your help with something.

Sh...shouldn't you ask DCI Baxter?

Uh, he stood me down.

And he'll have my badge if he finds out I haven't.

Well, maybe you should listen to him.

Look, Blackwood insists that our victim is Roland Mitchell.

But I've just spoken to his mother and she's adamant that it's not.

And just now, I got a call from Trevor Willett at the APHA, there's two more confirmed cases of anthrax, both of them passengers on that bus.

But how's that possible?

When we're told that the strain of anthrax that killed Roland Mitchell, or... or whoever he is, can't be spread through human contact?

Um... maybe there's another mode of transmission on, on, on the bus?

Well, that's what I need your help with.

Look, I've...I've been sent the onboard CCTV from the bus company.

Will you take a look?

You know more about this than I do.

No, I'll, I'll, I'll do it, DS Hunter.

I owe you big time.

I'm sending it over to you now, alright?

Okay.

(suspenseful music) He was...vaping?

Well, I mean, that means that everyone on the bus is at risk of infection.

Oh no, Detective Bea.

(high tempo music) (water running) (urgent knocking) Bea?

Bea?

(key rattles in lock) DISPATCHER: Emergency, which service do you require?

Yes, ambulance please.

Bea?

Bea, it's Patience.

(ambulance siren wailing) (door closes) (heart monitor beeping) (gentle music) Any news?

I...

I don't understand.

She... She used protection.

Lightweight masks are no guarantee against COVID, DS Hunter, let alone... anthrax bacteria.

We have to catch who did this to her.

Well... can you get a hold of that vape?

You just let Blackwood try and stop me.

(traffic humming) You're up early.

You know, I'm sure Maynard would understand if you didn't feel up to going in to work today.

Just this once.

I...I need to be doing something.

I think that sounds very wise, Patience.

See ya.

-Thank you.

Miss Evans.

Mr. Scott.

This isn't where you work.

I've come to say sorry.

For taking a liberty.

Asking you on a date.

No, you didn't... you didn't, I... it's just no-one that I like has ever really asked me before.

So, you do like me?

-Yes, I think so.

-(chuckles) Um, but I'm not sure I'm actually attracted to you.

-Oh.

-Well, I've...I've been reading this book, and... well, I...I find feelings and things hard to... place, so...

I guess if I'm unsure, the answer's probably no for now.

For now?

Well, worrying about Detective Bea is... it's all I can think about.

You know, if she... when she recovers, I think I'll... probably feel differently about a lot of things.

Do you know how she got infected?

I know how, but not by who.

And I think the answer's in the restricted part of the archive that I don't have access to.

At the risk of it seeming like I'm... trying to ingratiate myself with you, Miss Evans, you should be aware that Dr. Parsons can access restricted files related to public health emergencies.

Using powers under the Public Health Act granted to medical practitioners.

-I could kiss you.

-Oh, ha... (romantic music) (little kiss) Well, now I'm even more confused.

(laughs) (background chatter) We're hoping you can test it against the strain that killed our man on the bus.

Confirm it's our murder weapon.

The other passengers must have been infected when anthrax bacteria was exhaled through the vape smoke.

It is the only theory that fits, Dr. Parsons.

Bacillus anthracis forms spores with hard shells that can survive dormant outside a living host for decades.

Yeah, I don't need a lecture on anthrax infection, Miss Evans.

I assumed our friends in the RCTU would have had this under lock and key, that's all.

Well, that won't be the first thing to go missing from the evidence store.

Look, Patience discovered that 412 grams of anthrax powder was recovered on that raid at the CDF lab four years ago, right.

But according to my contact, only 350 grams can now be accounted for.

Well, who'd have the security clearance and the know-how to remove hazardous material from a secure unit?

Well... DS Hunter and I think... think the answer's in that file.

(scoffs) I'll be risking my job.

Yeah, well, it's your life that would have been at risk on that bus, if you hadn't had a respirator mask.

Well, what happens if she's wrong?

She's been right about everything else.

(dramatic music) (mice squeaking) (pages flicking) (heart rate monitor beeping) And if it was me, Jean, I couldn't go to my grave with that on my conscience.

(soft music) Knowing... that I hadn't helped... to apprehend whoever murdered my son's father.

-What?!

-We accessed the Dalton files.

Give me your warrant card.

I warned you.

Sir, it was actually my idea to access the file.

Oh, well, consider yourself suspended from all police duties as well, Miss Evans.

Permanently so.

Sir, a responsible police officer would consider the evidence that DS Hunter and I have uncovered, rather than rush to take disciplinary action against us.

(Baxter sighs) Alright.

Two minutes.

Alright.

(clears throat) Right, our victim, ID'd as Roland Mitchell, alleged member of the CDF, supposedly on the run since a fatal arson attack at a factory where he worked.

But this... is the real Roland Mitchell, according to his mother.

-Well, then who...?

-Tyler Rose.

He worked as an undercover police officer for the CDF eight years ago.

-His cover was blown, and he was killed.

-No, Sir.

-What's this?

-That's a sworn affidavit signed by Jean Crick before she died last night.

Jean Crick and Tyler Rose met and fell in love shortly after his assignment had started.

Tyler blew his own cover to Jean, vowed to renounce the police and his old life and start afresh with her.

She got pregnant by him?

They had a child, Noah, and began to look for a way for Tyler to disappear.

So, then Tyler got a job at the Dalton meat factory.

He helped Jean plot and execute the fatal arson attack that burnt it to the ground five years ago.

No one was supposed to be on site that night, but as Tyler went to make his escape, he discovered the body of his colleague, Roland Mitchell.

And he was already dead.

Yeah, fatally overcome by fumes.

Tyler saw his chance to leave his former life behind, so he doused Mitchell in petrol and planted some of his belongings.

And by that time, the body was too badly burnt to be identified using DNA techniques.

Yeah, but the police officers that recovered the corpse found a ring nearby it.

It was the only thing that survived.

The melting point of titanium is 1,668 degrees Celsius.

Yeah, the ring was recognized by one of his counter-terrorism colleagues.

So, we thought Tyler Rose had died on assignment, but he'd actually disappeared, hoping to live quietly as Roland Mitchell and bring up his son with Jean Crick?

Yeah, until Jean Crick was arrested and sent to prison.

And Tyler was persuaded to go back undercover on the CDF's behalf.

He steals the identity of a tourist and winds up dead on a bus, infected by anthrax.

But how?

Um, well, I...

I think you need to brace yourself for this, Sir.

The counter-terrorism unit reinstalled surveillance cameras for known members of the CDF and their associates four months ago after a tip-off.

Is that correct?

(dramatic up-tempo music) (dramatic music) Did you recognize Tyler straight away from the surveillance photos?

No comment.

(soft music) Uh, D...Detective Bea.

Oh, no, no, no touching, no touching, sorry.

-Sorry.

-(laughs) I'm glad you're out of the hospital.

For the tape, I am showing footage recorded on a security camera at the property next door to Vicky Crick's.

(ominous music) What were you looking for?

-No comment.

-For the tape, I am showing an envelope addressed to Roland Mitchell, containing four unused vape cartridges.

The post office has given us the... card details that were used to pay for the postage.

Now, the card is registered to a Mrs. Z.

Rose.

Does that ring any bells... Zara?

No comment.

It was Zara who identified Tyler as having died in the fire on the basis of that ring.

Now, for the avoidance of doubt, a certain someone in criminal records managed to track down Tyler Rose and Zara Blackwood's wedding license.

-JAKE: Mm.

They were married 13 years ago, but they kept it a secret so they could go on working together at counter-terrorism.

Why murder him, though?

Why not just have him arrested once you found out?

Well, jealousy is a very powerful emotion.

It can make even the sanest of people act irrationally.

Tyler Rose and Zara Blackwood didn't have any children together.

I checked and she hadn't taken a day of maternity leave in 20 years of service.

So, perhaps it was Tyler's idea not to start a family, given the line of work that they're in, but...

I imagine when she saw the surveillance footage of him playing with his child by another woman, it... tipped her over the edge and... set in motion a plot to kill him.

You worked out our puzzle, Patience.

(dramatic music) (laughs) Alfie seems a lot calmer.

We've started him on medication, found him a...a new school as well.

-What's this?

-Oh, put that back, love.

Oh, no, it's alright, Alfie, you can bring it here.

It's a puzzle box.

What's inside?

Um, I'm not sure.

(gentle piano music) I always thought that it would... contain the answer.

The answer to what?

As to why my mother left me.

I've always been... too afraid to... open it, but...

I think now I might be ready.

(box pieces click, slide) (melancholic music) (footsteps receding) (box slides shut) (dramatic music) (suspenseful music)