Original subtitles

[LIGHT PERCUSSIVE MUSIC]

♪

Onto today's topic.

Why do we learn the wrong lessons

from low probability events?

Take texting and driving.

We know it's a bad idea.

So why do so many of us still take that risk?

Because we're irrational

in some way you're about to tell us.

[LAUGHS] OK, OK.

I walked right into that.

But she's right. We are.

Imagine the actual risk of crashing while texting is 2%.

And every time you don't crash,

you update your internal risk barometer.

After a while, you feel so secure

that you're texting even more.

This, my friends, is called the faulty learning cycle.

Our real risk never drops,

but our feelings about that risk,

based on our limited experience with crashing, lie to us.

So the next time you get away with texting and driving,

remember, you got lucky.

And you could always use my method,

which is rarely text and never drive.

[LAUGHTER]

That's a let.

Ball grazed the net. We both saw it.

Did we?

Or is your terror at facing an opponent of my stature

distorting your ocular input?

Sorry to call again.

It's my first day back with Dr. Mercer,

and I need my access restored to his server.

Oh, sorry, Phoebe.

Also, hello.

Welcome back.

Uh, let me just...

I suppose you want your old spot back, huh?

No, it's OK.

Uh, I'm good here, under the AC vent.

You two keep working.

Hm.

Phoebe doesn't feel it yet.

The power of the preemptive break.

How could she? We only just stumbled upon it.

Studies show breaks at work enhance productivity, right?

But starting the day with a break...

that's something only a Mercer-nary could figure out.

- A Mercer-nary? - Mm-hmm.

[PHONE RINGS]

Oh.

Go ahead.

It's fine. You can take it.

I don't care who picks up

as long as it's not my voicemail.

Professor Mercer's phone.

It's HDP.

They say they can get you in with the company founders.

They can? When?

This morning?

That might be a little...

actually, that's great.

Yes, thank you.

He'll be there in an hour.

HDP?

Horizon Decision Partners.

They're a consulting firm of forecasters.

Ultra-forecasters.

It's what they call the really good ones.

Oh, are these the people who claim they can

actually predict the future?

Sounds a little sci-fi.

No, it's not. It's data modeling, you know?

You love data.

Imagine a drug maker

trying to predict the next pandemic

or a politician looking to craft new policy

ahead of Supreme Court decisions.

You'd order a forecast from HDP.

It's pretty cutting edge.

They can predict market moves, sports outcomes,

elections, even wars.

Between their data and mine,

I can see some real opportunities

to help people make better decisions.

Of course, they're booked solid for months

with fancier clients.

So we figured out a workaround.

Rizwan and Simon already know this,

but I'm debating a new laser surgery to reduce my scars.

I requested a forecast of my outcomes

so that I can weigh the risks.

Sounds like they bit.

So who can predict which of you three will drive me?

♪

I'll be right back.

Thank you.

For a field I only learned about today,

this office is impressive.

Wow.

Speaking of offices, how's it being back?

Fitting like an old shoe?

- Kind of smelling like one. - [LAUGHS]

Yeah, the boys don't uphold the Phoebe tidiness standard,

that's for sure.

The thing is, Rizwan's the head RA now.

And even if I wanted to big-foot him,

and I don't, I've caught up on his work,

and it's fantastic.

So my only question is...

How to deal with the pecking order?

What if I say I'll leave you guys to figure that out?

I would say, of everything I've missed,

this is what I miss most.

I'm afraid there's been a mistake.

There's nothing on the books this morning with Dr. Mercer.

Our CEO, Willa, and our partner, Zed,

are both at a breakfast.

[INDISTINCT CHATTER]

That's odd.

So who called us?

That'd be me.

I'm sorry for the bait and switch, Dr. Mercer and...

Phoebe Duncan.

I'm Laura Bennett.

I've followed your career forever.

I didn't think you'd take a meeting with an associate forecaster.

But I know you're the person to call when there's a serious problem.

So what's the problem?

I think a lot of people are about to die,

and I need you to help save them.

Synced & corrected by -robtor- www.addic7ed.com

HDP hired me for my high-accuracy forecasting

in the transpo sector...

you know, cars, planes, trains.

For some reason, I really get trains.

And much like this type A, they're subject to

the always/never paradox.

Those are systems that are always in use

but should never fail?

Though, with transportation, there's always a baseline accident risk.

When we forecast, we start our models off that percentage.

Tell me if I follow.

You look at what happened before,

and you adjust the risk based on current conditions.

Exactly.

And currently, the mid-Atlantic corridor of the railway system

is looking at a perfect storm of risk,

predicting a mass casualty event

sometime in the next 24 hours.

That's a pretty precise window.

For the next 24 hours, Line 1 is shut down

due to a bridge repair, diverting all traffic

to Line 2, which is about 100 years old

and in desperate need of servicing.

Which ups the chance of derailment or collision.

By 20%.

Plus, with a spike in flu cases,

the railway is understaffed.

It's a holiday weekend, which must mean more travelers.

And bad weather to boot.

Any one factor, the system survives.

But this many?

This says two days ago,

someone hacked into Line 2's PTC.

What's that?

Positive Train Control.

It's an automated safeguard against crashes,

which is now down.

So we're suddenly looking at a looming catastrophe.

I don't know what'll go wrong or exactly where,

but the numbers suggest it will happen.

And it's not just passengers at risk.

It's rail employees, all the people living

and working along the route.

This can't be the first time

that your company's spotted disaster.

What's HDP's protocol for intervention?

That's why I called you, Dr. Mercer.

We have a policy of non-intervention.

So you don't do anything?

It's Willa's policy.

She feels very strongly about it.

Do you have any concrete evidence you can show her,

a specific event?

I'm eyeing four passenger trains

out of New England this morning.

If any of them leaves more than 30 minutes late,

they will speed to make up time,

bringing their odds of a mass casualty event

up to 87%.

[TENSE MUSIC]

So are they late?

♪

The first two left on time.

The third one, only 10 minutes late.

But the Orlando Express is projected to leave

20 minutes late.

So far.

Come on, kids.

We're gonna miss the train.

Put on your fast legs.

Dad, I looked at the maps.

We can hit every attraction at the park,

but we'll need to move fast.

Final boarding call for the Orlando Express.

I am all in, bud.

But first, we gotta get on this attraction.

All right. All right, are you ready?

- 1, 2, 3. - My purse!

- [BELL RINGING] - Mitch!

- Oh, no, no, no. - Oh, oh.

Oh, uh, Conductor!

Please, can you help us?

Nothing like a scare to start a vacation.

Well, lucky for us, we have 22 hours

of gorgeous scenery to get over it.

The Orlando Express just left 32 minutes late.

There's an almost 90% chance

that the system fails catastrophically.

Which means any of these trains

could be headed for disaster.

[TENSE MUSIC]

♪

Dr. Mercer, this is our CEO, Willa,

and Zed, our head of data.

I'm sorry, Dr. Mercer.

But our policy, it's ironclad.

Help me.

If you forecast something terrible is gonna happen,

why wouldn't you intervene?

Because that's just not what we do here.

We work for our clients, which, in this case, is...

A lumber company looking to reduce shipping costs.

We're data scientists, nothing more.

So are we.

But our jobs can't just start and end with data.

We go to amazing lengths to respond to a disaster.

How could we not do the same thing to prevent one?

If we cry the sky is falling,

there are two possible outcomes.

One, nothing bad happens and we get sued

for wasting people's time and money.

Two, disaster still hits

and we get sued for not warning them sooner.

But surely, the bigger risk is loss of life.

Maybe, or maybe in trying to stop

something from going wrong, we inadvertently

cause something else to go wrong.

You mean the law of unintended consequences.

And as Laura well knows, we like to think of ourselves

as time travelers.

I mean, any interference,

it can disrupt the timeline.

And we can't take that risk.

I'm sorry for wasting your time, Dr. Mercer.

[TENSE MUSIC]

Whoa, we're speeding up.

Think the engineer is trying to make up time?

I hope so.

Check-in's at 4:00 tomorrow.

Just so I have this straight,

the American Railroad Organization, the ARO,

has a safety system called PTC?

Yes, Positive Train Control.

And you want me to look into a hack

that took down Line 2's PTC,

according to someone at HDP, ASAP?

[LAUGHS] You having fun?

Just flashing back to all those acronyms

in the FBI handbook.

I'm on it, Alec.

I'll call you back.

Uh, I almost didn't recognize the place.

[LAUGHS] Yeah, it needed a little personality.

Alec told me that he was gonna ask you

to look into the hack.

He wants me to try to get the American Railroad

Organization to issue an emergency stop order,

but no luck so far.

I can't imagine big three-letter agencies

like to be bossed around by other ones.

Well, that's not really the FBI's purpose.

If we had more than Laura's forecast in hand,

we could do better.

Well, I'll tell you this.

Whoever took down PTC was hardcore.

- Oh? - Yeah.

FBI Cyber's already poked into the hack.

No idea.

But whoever did this used a military-grade virus.

This baby doesn't just corrupt software.

It ebolas hardware.

The initial strike took down all the PTC control boxes on Line 2,

and since then, our hacker has been destroying new ones

as fast as they're replaced.

It sounds like one of those ransomware attacks.

But there's no ransom demand?

Nada.

And no terrorist organization has claimed responsibility either.

So someone just wants to make trains

less safe for some reason?

Mm.

Well, too bad for them, Kylie's on it.

Once I find them, the only acronym they'll be saying

is FML.

Simon, Rizwan,

I'm gonna throw this ball at your head.

Duck.

I submit to the court that warnings work,

HDP's justifications be damned.

But Laura believes the only way to lower the risk

is to shut down the entire Mid-Atlantic Corridor

until the window of danger passes.

Shut down the entire corridor?

An always/never system like railways

won't just have an off button.

It's largely by design,

and I fear that may work against us.

ARO could issue an emergency order.

I've asked Marisa to look into it.

Yeah, but it'd be an outside shot

even if Laura's forecast had Willa and Zed's blessing,

which it doesn't.

So a different target.

Founders Freight is the only company

that Laura says can effectively shut down the corridor.

Getting them to do it will be a hard sell.

They'll lose money.

So what's the best way

to get them to act on our warnings?

Well, I mean, it might take a minute, but I think we...

Top of my head, remember the riff

on Ernst Fehr's costly altruism paradigm we ran last year?

[LIGHT PERCUSSIVE MUSIC]

Totally.

That's a great idea.

Ernst Fehr?

I'm not familiar.

Phoebe, can you catch him up?

In effect, we'll be asking a company

to forfeit a day's earnings to avoid something bad.

Right.

Our costly altruism experiment helped figure out

who people were more likely to do that for,

themselves or others.

We ran two variations.

And Rizwan thought the risk factor had to be

truly awful, so we decided on...

Chum.

[SIGHS] Have you seen "Jaws"?

Sharks love it.

Humans, not so much.

We told our participants

they had a chance to spin a wheel.

If they played, they'd get $50.

But if the wheel landed on red,

I'd dump a bucket of chum on their heads.

Anything to help with chapter dues.

Variation 1, 81% of them were willing to play.

♪

[WHEEL TICKING]

[SIGHS]

[WHEEL TICKING]

Worth it!

Oh!

[LAUGHTER, GROANS]

Not worth it.

Next, we told the second group there'd be

a different consequence for a red zone spin.

Rather than dump the chum on them, we'd dump it on...

Who wants to risk sweet Mrs. Oris?

Chum Grandma? No way.

In our second variation,

only 53% wanted to risk Mrs. Oris.

[WHEEL TICKING]

♪

Oh!

[LAUGHTER]

It's the concept of social utility.

People are sometimes more motivated

to protect others than themselves.

It seems like that's how we should warn Founders Freight...

frame it that the real damage is to others, not them.

They could save hundreds, maybe thousands of lives.

Talking about so many lives

makes people think in numbers,

which might actually dull our impact.

But if we get specific with social utility

about who could get killed, like Mrs. Oris,

that could do the job.

Phoebe, can you help me find an identifiable victim?

[SIGHS]

So that's Phoebe.

Back 5 minutes and...

Casually pantsing the both of us.

You'll get used to it.

Just a couple of Kens getting Barbied.

It may stop a disaster, though.

We should help. Mercer-naries fan out.

Founders Freight CEO, Denise Franks,

this is Laura Bennett.

And this is Private First Class Zach Kowalski.

Zach is on a train home to Dover right now

on special leave from Fort Sill.

His wife just gave birth to their first son.

From what he's posting, Zach is elated.

He has no idea the danger he's in.

And you can keep it that way.

Founders Freight owns

70% of Line 2's physical tracks.

Help us, Ms. Franks. Shut down Line 2.

All we need is 18 hours

to finish the repairs on Line 1.

Look, even if I believed in this forecasting...

Uh, respectfully, it's not a matter of belief.

It's not crystals and tea leaves.

Laura is a data scientist.

It's probability.

I was with the FAA post 9/11.

Everyone knew another attack was coming,

so we shut down air traffic for three days

and nearly bankrupted the industry.

You're worried about unintended consequences.

We grounded planes because something might happen.

And that harmed people too.

Sick people got stuck without their meds.

Auto fatalities went up with the forced increase in road traffic.

I'm not making the same mistake again, Dr. Mercer.

♪

[DRAMATIC MUSIC]

♪

So much for social utility.

The odds couldn't be clearer.

They say, "Stop the trains."

But Ms. Franks is afraid of landing

on the lower percentage side of things.

In my field, we call that getting caught on the wrong side of maybe.

Which means we have to find another solution.

If we don't, people like Private Kowalski

may never get back to their families again.

OK, OK.

What if we trigger a multi-state blackout?

What?

I mean, I'll write it down.

It's all right, man.

None of us are hitting home runs.

True.

You did suggest that my family buy the railroad.

- Yeah, that was a joke. - It sure was.

Levity lightens stress, which can promote creativity.

Uh-huh.

How goes it? Any progress?

Does negative progress count?

The problem is, our best ideas are also highly illegal.

I just talked to Marisa.

ARO won't shut down Line 2.

They say that everything is technically within regulation...

the tracks, the personnel, signals.

Does that Include their busted PTC?

After the hack, they issued a waiver

to keep the traffic flowing on the line, claiming it was safe.

So a shutdown order would be an admission they'd made a mistake.

We have to find a new play.

Kylie said that whoever hacked the control boxes

is still taking them down.

She thinks she's close to tracing the virus back to its source.

But even if that works, the system is still on the brink.

Laura, Zed, was there a crash?

Not yet that we know of, though Laura had a near-miss.

Word got back to Willa that I went around the firm's policy.

And she threatened to fire Laura.

But as we argued, I had a sense of clarity.

Now, before we opened Horizon Decision Partners,

I used to publish forecasts directly on online forums

so that the public could act and change things.

I really miss that now.

I want to help. What are you thinking?

How soon can you get on the news?

Depends.

Now, I watched your clips from the past year...

NBC, PBS.

You're convincing.

I say you go directly to the public.

You want me to tell the public

about a train crash coming?

We're eight hours into this thing, and we've been lucky so far.

But I just ran a forecast.

If we can disrupt enough passenger trains,

the system will cool to a safe level.

Maybe.

But we're not taking irrationality into account.

I mean, wouldn't that cause a panic?

Rizwan's right.

When brains think they're headed for disaster,

people may freeze, try to flee, or fight.

What if the riders revolt to stop or get off a train

and we actually make a disaster happen that way?

We didn't calculate for that.

They're right.

We don't want to risk mass panic.

But I might have a way to get travelers to cancel their trips

before they make them.

Welcome back.

We are talking about the cutting-edge science

of ultra forecasting

with the irrational Dr. Alec Mercer.

Joy, we're all irrational.

I know. I just love saying that.

So this forecasting stuff is making me feel

like I'm in "Minority Report."

Can you give us an example of how it might be used?

Well, I just had an interesting chat

with an ultra forecaster who predicts that

train travel will be a nightmare

from now until tomorrow.

They landed near 85% that there will be

nothing but delays and cancellations

up the whole Mid-Atlantic Corridor.

He's forecasting delays instead of catastrophes

to reduce train travel without causing panic.

Big area.

If it were me,

I'd be looking for any other way to travel.

Well, folks, you heard it here.

We've seen the future, and it's you

rethinking those train plans.

Any pointers before we go in there?

Just follow my lead.

You're a wizard for tracking the virus back to this base.

You'll know when to jump in.

What if they won't talk?

Marisa put us on this because she trusts us

to handle it while she focuses on preventing a train disaster.

But I don't know.

They'll talk.

In fact, as far as they know, each of them already has.

Captain Francine Sharp.

Yes.

- Marine Major Jeremy Andre. - Yes.

You're aware of the charges that you abused your access

to steal a viral weapon from this base,

which was used to hack the train system?

That's a lie.

Try proving that.

Here's the thing. I don't need to.

Your partner already confessed.

I guess he didn't see another option once he saw what we had.

Miss Mercer?

[CLEARS THROAT]

So here's the deal.

When you stole the virus, you scrubbed the code

of anything that could trace it back to this base.

But what you didn't know is that the servers here

leave a hidden data stamp on every file they touch.

And if you know to look for that,

you can pinpoint that download to this base

during your joint shift.

If you know so much...

Why am I even sitting here?

Because your partner only confessed

to helping steal the virus.

They say you're the only one that knows what happened next,

that you hacked the PTC or sold it to someone who did,

which means if you don't talk, the bulk of this lands on you.

So what will it be, truth or consequences?

[SCOFFS]

[TENSE MUSIC]

We sold it.

We sold it.

It's working.

People are so bailing on their train trips,

thanks to the professor's interview.

And to Kylie for making the clip go viral,

however she does that.

Oh, Laura's calling.

Laura.

You guys, so many people canceled in the last 90 minutes.

The train lines pulled 17% of passenger trains

out of service.

My forecast is changing as we speak.

Oh, it is changing, all right.

With passenger traffic cut, freighter traffic's up.

That's fine. Didn't we expect that?

Did you also expect that most of those freighters

are hauling crude oil?

You know what we call those? Bomb trains.

Because if one explodes, it'll kill thousands.

This... no, this wasn't in my forecast.

There has been no increase in oil prices.

Look, watch what happens when we add those into the mix.

[BEEPING]

This is exactly why I didn't want you to intervene.

91%.

And it's why you're fired.

Whoa, wait. What's going on?

With these bomb trains in the mix,

chances of a disaster just went up to 91%.

Which means...

When... not if... people die,

it'll be our fault.

[HORN BLARING]

A rumor just hit my socials.

Looks like we might be in for some mega delays.

Should we get off at the next stop, rent a car?

We're still moving.

Do you really want to wrangle all of this off the train?

And boom.

Kylie magic.

While Cyber goes through the list of everyone

the Marines sold that virus to,

at least we can see if anyone's close to crashing,

including those oil trains.

I hope we can do better than that.

Laura, I'm glad you could make it.

I'm sorry you lost your job over this.

Thanks.

Wait, is that the ARO's internal train tracker?

Yep.

I'm that good.

God, there are way more oil trains than I thought.

Why are there so many?

Good question.

The timing of the PTC hacks is suspicious enough.

Add to that, the hacker is fighting to keep them offline.

Plus, all of these bomb trains.

It makes me wonder, is someone playing against us here?

Now that I can see where the trains are speeding,

I can forecast which ones are more likely to crash.

There's no one better than Alec

at talking people into better decisions.

If we can radio the engineers of the most endangered trains,

then maybe he can get them to at least slow down.

Looks like problem train number 1 is the one

that left 32 minutes late.

The Orlando Express is speeding and will pass multiple oil trains.

OK, we start there.

Only that stunt that Alec pulled with Joy Reid

probably ticked off the entire train industry.

They're not gonna be leaping to connect us with the engineers.

Hacking into radio signals is the oldest hack in the book.

I'm on it.

OK, so bad thought.

What if this guy just laughs us randos off the line?

Well, he shouldn't.

Marisa will announce that she's FBI

and give me the legitimacy to cut through any doubts.

OK, then.

3, 2, 1.

We're live.

Engineer Chip Parsons,

this is Special Agent Marisa Clark of the FBI.

- Do you copy? - Parsons. Copy.

But this is a private channel. Dispatch only.

Then you can imagine how serious I am contacting you.

I'm investigating the PTC hack,

and there is an imminent crash risk in your area.

We need you to slow way down.

I'm on a schedule, ma'am.

That's a no-go until I hear from my boss.

What about your boss's boss?

We've been speaking with the ARO.

Do you know who that is?

Yes, I do.

OK, I'm going to give you

to my consultant, Dr. Alec Mercer.

He can fill you in.

Hi, Chip.

Is it Chip or Parsons?

Chip's fine.

I can understand how your head may be spinning

from this PTC situation.

You're telling me. But all's well here.

We only got PTC on this line four years ago,

and I managed before that.

I'm just running it old-school...

blocking signal, keeping it safe.

I'm sure you mean to.

But you're going 20 miles over the limit.

I've been disciplined for late arrivals.

I can understand how much pressure you must feel.

But those late arrivals,

I can't imagine that they were on you.

Of course they weren't.

That's what I'm saying. The system is over-stressed,

and it's about to break.

But it doesn't have to break with your train, Chip.

If you slow down until the system settles,

you will arrive late.

But if you don't, your passengers may get hurt.

[TENSE MUSIC]

♪

[BEEPING]

Damn. Damn it!

What's going on?

I'm being diverted.

I... I gotta go.

He's gone.

Like, radio off gone.

And he's speeding up.

- What is happening? - I don't know.

ARO ticker says there was an incident

ahead of Chip on the tracks.

A commuter train on Chip's line almost hit a maintenance truck.

I have video of the incident.

[SUSPENSEFUL MUSIC]

Go, go!

Out of the way, out of the way now!

♪

They switched it just in time.

Was anyone hurt?

Ticker says there's no injuries,

but the commuter train did crack an axle

when it sidetracked at that speed.

Looks like the disabled train is blocking Chip's route.

That's why they diverted him.

This is nuts.

We have 12 hours until we're out of the danger zone,

and now all of the north- and southbound traffic

are sharing a single set of rails.

Which means the Orlando Express

is almost certainly on a collision course

with one of those bomb trains.

♪

Marisa's got ahold of first responders.

She's readying them for a possible crash.

Why would they put two trains on an actual collision course?

There has to be a protocol to let them pass.

There is. There are side loops off the main track

made for passing.

FF-388 will be pulling onto one soon.

Only problem is, this side loop is 3 miles long,

and our bomb train is even longer.

You're saying that the train's tail

is just gonna hang out on the main track like that?

How is that even a thing?

There is a maneuver for the trains to pass safely.

FF-388 has to move at just the right time

to let the Orlando Express by.

That sounds delicate.

Kylie, who's driving that freight train?

The ARO may say it's safe out there,

but you'd need two experienced engineers to pull that off.

It looks like it's a Conrad R. Fisher, age 34.

He's only been driving freight trains for all of four months.

We can't rely on this Conrad

to let the Orlando Express pass by safely,

not with Chip speeding like he is.

We need to get Chip to stop.

[TENSE MUSIC]

♪

[SIGHS]

Are you OK?

What if Willa's right?

We changed the timeline, and now it looks like

those two trains are gonna crash.

The future isn't written yet, OK?

Whatever happens, we will get through it together.

Right now, I have an idea that I need to go over

with just you.

Why just me?

Because it's a very risky Hail Mary.

And if my sister knew what I was up to,

she'd try to stop me.

[TENSE MUSIC]

♪

[SIGHS]

Well, in the spirit of long shots,

I called my mom to see if we know anyone

who could help shut down that 100-mile stretch of track.

Turns out, our family divested from our railroad holdings

too long ago to have much influence.

First, I will never get used to sentences like that.

But seems like we're both in the same boat here.

Yeah, I feel that.

Are we just talking about the case?

Because I can't help but feel it's been a little...

Weird since you came back?

Exactly.

And I don't want you to feel weird.

You either.

[SOFT MUSIC]

Riz and I were talking, and, uh, it's a new dynamic.

Would it help if I say that I am intimidated as hell by you?

What?

No, you're not.

Are you kidding?

You practically sneezed out that costly altruism idea.

Simon, I've been doing this for years.

Oh, so you're saying my insecurity is irrational?

I think Rizwan's feeling it too, by the way.

He isn't sure whether to mediate or defer to you

or what.

I know.

I know.

So what do we do?

Can you sneeze again and figure this out?

I would if I could.

But I promise, with this,

we're all on equal footing.

♪

Cyber finally connected one of the buyers

to the attacks on the PTC.

Does that mean we caught our hacker?

The field team is arresting him as we speak.

George Millton,

AKA VenomToxx.

[TENSE MUSIC]

Who hacks trains?

I don't have any idea what you're talking about.

I'm talking about you, George,

the kind of person who uses a computer virus

to disrupt a safety system to make trains crash.

What happened?

Did your dog get hit by a train when you were a kid?

I told you.

It wasn't me.

Come on, George.

The Marines you bought it from gave us your name.

They're lying.

OK, you really want to play that game?

Because your hacks

are gonna cause a train disaster,

which means that you're not gonna only be charged with computer fraud.

You'll be charged with homicide and possibly terrorism.

I'm no terrorist.

You deployed a military-grade cyber weapon

on a civilian transportation system.

What would you call that?

Is this some kind of message?

What's the agenda?

I don't have an agenda.

I have a quote.

You're a work-for-hire?

Who hired you?

They left an envelope full of cash,

and I didn't ask questions.

They just wanted the PTC boxes down.

Did they say why?

I don't know.

Well, let's start with what you do know.

[SIGHS]

- Is that Kylie again? - Yeah.

I'll talk to her after I stop this disaster.

So how are we doing this? You said you had a plan?

I do, but it can't include you, Rizwan.

I need you to stay far away from this.

What about you?

Professor?

I'm right where I need to be.

[SUSPENSEFUL MUSIC]

♪

Kylie, I need to see what's going on here.

I found a traffic camera near the crossing.

Just give me a couple seconds to splice into it.

No damn way.

[SUSPENSEFUL MUSIC]

This is not a good idea.

♪

[HORN BLARING]

Once again, my brother chooses crazy.

It's not entirely crazy.

The crossing he's at has a motion-activated hazard sensor.

So as long as he keeps moving,

it's gonna blast an emergency message

that a person is on the tracks.

The Orlando Express is required to obey that message.

Chip has to stop.

So you helped him figure out how to do this.

Well, that spot's a bottleneck.

It should bring all of Line 2 to a halt.

The only problem is...

Oh, you only see one problem?

Chip could bet on the professor bailing

and leaping off the tracks

instead of braking the train hard, risking derailment.

It's a real life trolley problem.

One man on the tracks to save hundreds.

Very Alec. I'll give him that.

Chip is irrational.

I mean, if he doesn't stop, Alec could die.

Well, my forecast put the chances

of the train stopping at 90%.

I was very clear what the other 10% meant.

But he liked his odds.

[TENSE MUSIC]

[HORN BLARING]

Chip's alarm has got to be going crazy.

Why isn't he stopping?

[BEEPING]

[HORN BLARING]

He's banking on me to blink.

I'm banking on him.

Well, one of you is wrong.

Can he even stop at this point?

Is it too late?

I can't forecast when it's this close.

[HORN BLARING]

[BEEPING]

Move! Move! Move!

Brake!

[BEEPING]

[BRAKES SCREECHING]

♪

This is the Orlando Express.

We had to make an emergency stop.

Emergency stop.

Line 2 shut down.

Repeat, Line 2 must shut down.

♪

All the trains are stopped.

Gotta love a good traffic jam.

- Whew. - So it worked.

Alec didn't die. The train stopped.

And I only had a minor heart attack.

When the Orlando Express stopped at that choke point,

dispatch was forced to stop traffic all the way up Line 2.

Giving us the system reset we need.

By the time trains are moving again,

Line 1's bridge will be repaired,

and traffic will be restored on both lines.

Plus, you caught the hacker.

I just keep wondering, if we hadn't had the PTC hack,

would things have gotten so bad?

No. No way.

PTC was designed to prevent

the situations that happened today.

That's what I thought.

Millton has no idea who hired him,

but whoever it was also urged him

to keep taking down the PTC boxes,

even when the bomb trains kept entering the system.

So it was all connected?

Someone did all this counting on a train disaster.

But who would do that?

Only someone who would see it coming.

I had a hunch,

and I looked into your finances.

Guess what I found.

You made a big play on one of your own forecasts,

but you missed.

You dug yourself a $3 million hole,

and you had to make it up fast.

Luckily, one bad bet aside,

you're still the best at what you do...

so good, in fact, that you saw that

the train system was overheated

weeks before Laura did and jumped on it.

You hired George Millton to take down the PTC system

to guarantee a disaster,

and then you shorted train stocks to profit.

Only you didn't foresee me.

♪

You can't prove any of that.

Oh, but we can.

Along the way, you made a mistake.

You said you watched me on PBS.

It didn't register then.

But then when I knew that we were looking

for a forecaster, it hit me.

My PBS talk was about panic triggers.

That's why you urged me to go on the news

about an imminent crash

because you were banking on

the resulting panic to cause one.

Good thing it didn't work.

That's not evidence.

No, but we have your computer now

with your private forecasts,

including one that says adding bomb trains to the system

will increase the disaster odds.

Not only that... the oil exec who ordered the bomb trains

said you called with a prediction

that fuel prices were about to rise.

And if he wanted to win,

he would have to move that oil fast.

So you can deny it if you want, but we got you.

You could have killed hundreds.

And now I predict that you're gonna go to prison.

♪

So I've thought about our problem.

That we ordered too many fries?

Sorry, I'm deflecting.

You mean the not knowing where we all fit

now that you're back situation?

Give that man a fry.

Mm.

The thing is, in light of the forecasting case,

I think our answer might be easier than we think.

We have to live in the discomfort.

Ew.

That sounds...

Uncomfortable, I know.

But if I took anything from watching Laura work,

it's that we need data to look ahead.

And right now, we don't have much.

I guess that's true.

I mean, you just got back.

I know I've changed since you were here last.

And every day with Simon is brand new.

Aw, buddy.

[GLASSES CLINKING]

That's why I think our best path

is to experiment, try out different roles,

and muddle to what works.

To figuring it out together.

To our newest Mercer-nary.

Oh, also, that name must die.

Non-negotiable. I will pull legacy rank.

Fine.

How about The Mercerfuls?

- [LAUGHS] - Oh, no, I got it.

I got it. The Professornals.

- Mm-mm. - [LAUGHTER]

Come on. That one's... that one's good.

I know I can be stubborn,

but I have to hand it to you two.

A lot of people are alive because you acted.

Does this mean, when lives are at stake,

HDP will intervene from now on?

I can't promise that.

But maybe it's not always/never either.

One thing I'm 100% on...

I never should have fired Laura.

Willa has invited me back to HDP,

this time in a leadership position.

With Zed gone, I need a strong partner

to challenge me now and then.

That's a smart move.

There's a lot of spectators in the world,

but not enough heroes.

And it doesn't take an ultra-forecaster

to envision an important future for you.

And once you're settled in,

maybe I can even get that meeting

with the partners on the books.

You got a deal.

Oh, and I almost forgot.

Peace offering.

You forecasted my scar surgery.

It's the very least I could do, given everything.

So take a look.

Call me if you have any questions.

But if you want the, um, the TL;DR...

- Mm? - "Too long; didn't read."

The report says, "Do it."

[LIGHT PERCUSSIVE MUSIC]

♪

[SOLEMN MUSIC]

♪

I know what you're gonna say.

Oh, so you also know that I'm still going to.

♪

You keep cutting it close and surviving.

But that doesn't mean that you can keep doing dangerous things.

♪

I have fallen victim

to a faulty learning cycle.

And I'll be more careful in the future.

Speaking of,

I got the weather forecast for my maybe scar surgery.

The odds are 91% in favor,

even factoring in my opioid addiction.

So you're doing it?

♪

No, I'm not, at least not now.

You don't want to get stuck on the wrong side of maybe.

Eh, that's part of it.

But when it comes to making decisions,

forecasting is just another tool.

It can point to maybe doing a brave thing,

like what Laura did.

But ultimately, we have to be comfortable

with our decisions, and I'm simply not.

All that is to say,

I'd rather focus on where I am now

than on where I hope to be someday.

I like that.

[SIGHS]

[LAUGHS]

Good, 'cause I do too.

You know, I think I'll also take my comfort

into consideration, and mine's saying,

put 24-hour armed security on your brother.

[LAUGHS]

♪

[TENSE MUSIC]

♪