Okay. Color and sound check, Milton-Staller wedding.
Amanda. Neal.
Hi, Mr. Staller.
Glad you could make it.
Hey, hey, hey. Take it easy, Nana. There's no hurry.
You take it easy. This my regular speed.
Everyone decent in here?
Come on in, Mrs. Staller.
Look who I brought, Shelley.
This is how David can see you in your dress before the wedding without the bad luck.
You look stunning.
Thank you so much for everything.
I'm so happy you're joining the family.
David is lucky to have you.
Okay.
I'm crying now. Let's not film this part.
No, no, no. Turn it off. Turn it off.
It'll calm him down.
I didn't think I'd be this nervous.
Happens to everyone. Even me...
...and look how I turned out.
Lynn.
Who is that man?
I don't know. Must be from Shelley's side.
Just breathe, man. Breathe. No. Where's your inhaler?
Where is it? Here.
Maybe just give us a few minutes? Sorry.
Just a couple minutes.
He's okay. He's good.
It's okay, it's okay.
I can safely say David is not going to run, so just...
...hang tight.
He'll be fine. He just had a little asthma attack.
It can't be.
- It can't be true. - What's wrong, Nana?
It can't be.
It's him.
Oh, Nana, what are you talking about?
It's him.
Nana, calm down.
You! You--
Nana, what's wrong? My God, what is it?
Oh, my God.
Someone call 911.
Josh.
Sweetheart.
My God, what is happening?
Agent Dunham.
- Detective. - Burt Manning. We spoke on the phone.
- So has anyone touched anything? - ME's inside.
We put them in a holding pattern until you got here.
It's pretty bad.
Do we have a final count on the victims?
14 so far.
I quite like weddings.
Did I ever tell you about when your mother and I--
- ...God rest her soul, got married? - No no no, I think I missed that one...
...and try to stop driving with both feet. Whoa! Whoa!
She was so beautiful, Peter.
So beautiful in white.
I won't deny I was never happier.
I kept my tuxedo...
...in the hope that one day I would have a son who'd wear it.
You could wear it on your wedding day.
Yeah. You know, Walter...
...tuxedo styles change.
Oh, nonsense.
Purple never goes out of style.
And the day may come sooner than you think.
Do you think she'll call me Dad?
Who?
Agent Dunham.
My guess would be no.
Don't look at me like that. She's just what you need.
Someone who can see right through you.
Agent Dunham, don't you look lovely today.
Doesn't she look lovely, Peter?
You look lovely, Agent Dunham.
Dr. Walter Bishop. How do you do?
Lose a bet?
It was either that or flying lessons.
Swelling of the vitreous humor.
Petechial hemorrhaging.
Yeah, not to mention the blue skin.
It's definitely asphyxiation.
Airway's clear.
Yeah. Same here.
No fluid in the lungs.
So all the victims that I've identified so far are on the groom's side.
Maybe they came in contact with something before the wedding.
Anaphylactic shock.
Maybe they're all having an allergic reaction to something they ate or drank.
That would be logical if they were all exposed at the same time, I suppose.
Well, I'll have the detectives reconstruct where they all were. We may find a connection.
She was a Holocaust survivor.
Dreadful.
To survive a thing like that...
...and finish up like this.
Walter, do you think this could be a deliberate attack?
I don't know yet.
All I know for certain is that these 14 people suffocated in a room full of air.
It's gotta be something they all ate or drank.
There.
Maybe that?
God, it's hard to believe that a few hours ago, this was actually a happy place.
Oh, my God.
We need a medic on the second floor!
Hey, buddy.
He's dropped his inhaler. Grab it.
It's curious.
All 15 victims.
- So they were all blood relatives then? - Yes.
All of the victims are direct descendants of Eva Staller.
Holocaust survivor.
And anyone not related to her survived.
Along with one grandchild who I think might be illegitimate.
Therefore not a blood relative...
...or I suspect he would have perished too.
Astrid.
Can you come here, dear?
What color is this?
The blood?
It's blue.
Good.
I'm not imagining it.
Something has bonded with the hemoglobin in the blood...
...changing its color and robbing the body of oxygen.
I believe these people literally suffocated from the inside out.
Walter, no. That might...
...be what killed him.
No, that kept him alive longer than the others.
I suspect it temporarily weakened the toxin.
That still leaves the how.
How was the toxin delivered?
Mrs. Staller, I understand that you were in charge of the guest list.
Did you notice anyone who shouldn't have been at the wedding?
Someone who wasn't invited.
No. Of course, I don't know the bride's entire family.
Although my mother-in-law...
...she was very upset with someone before--
A man. I had never seen him before.
I thought she was just having a moment.
If we showed you the wedding video would you think that you would be able to point him out?
I could try.
It's jasmine.
Shelley picked out the scent.
Represents happiness and love.
Do you mind giving me a moment?
Of course.
I'll help you with the video.
Thank you.
She just said all the rest of the candles in this place are jasmine, right?
Smell that.
This one's cinnamon.
And..?
Patience, son.
Just like when you were a little boy.
Your mother used to say you had ants in your pants.
- Put that in the spectrometer. - Okay.
That's the man that Mrs. Staller identified.
Can you make it clearer?
I can try.
That's the best I can do.
All right. Well, Upload it to the joint law enforcement database and...
...maybe we'll get a hit.
- All right. - Walter.
Come here. Take a look at this.
That is interesting.
You were right. This is our toxin.
Appears to be a variant of..
What is that?
Hydrogen cyanide?
The candle would suggest that it was activated by heat, and then...
...it dispersed into the air.
Well, if it was in the air, how come it only killed some of the guests?
Good question.
What?
Chemical weapons.
Death by asphyxiation.
The Nazis.
I knew this was familiar.
The Nazis?
The Nazis were scientific pioneers. They...
...attempted to advance every branch of science.
Molecular bombs, flying saucers, eternal youth.
Before DNA was even discovered...
...Josef Mengele...
...wanted to create a weapon capable of targeting specific victims.
A weapon capable of...
...picking people out in a crowd, just like what happened here.
It seems that science may have finally caught up with Nazi ambition.
Mrs. Staller was a Holocaust survivor.
- Do you think that that's-- - Relevant? I don't know, Olivia.
Of course, I'm not saying that this is the work of the Nazis.
Nor suddenly am I convinced that this was just a murder.
A wedding...
...is the perfect laboratory.
You have your target group, the Stallers.
And you have your control group, everyone else.
Are you saying that you think this was a science experiment?
It's a theory.
And one that I think I can prove.
How?
A scientist always tries to recreate his results.
If I'm right...
...this will happen again.
One soy latte, one orange juice, two yogurts.
Say thank you, Jordan.
Thank you.
I'd like a cup of tea, please...
...and make sure the water is very hot.
Sure thing. What kind of tea?
Oh, I don't know.
You pick. Whichever is your favorite.
Oh, and please...
...make sure the water is very hot.
So do you like her? Mrs. Greenwalt?
Yeah, she's nice.
But she always makes us take a nap after lunch.
Well, maybe you need time to get your energy back.
I think Mrs. Greenwalt is the one who's sleepy.
She's very smart, your daughter.
Yeah, she is.
Soon you'll be outsmarting the teachers.
We're already there. We're talking about skipping her up a grade.
Yeah, well, don't be in too much of a hurry.
These days are precious.
Soon...
...all you will have...
...are pictures.
That smells good. Is that cinnamon?
Yeah.
Something like that.
Nine victims.
Suffocated just like the wedding in Brookline.
Except unlike the Stallers, none of these people were related to each other.
Might have to rework that hypothesis, Walter.
Maybe this toxin isn't transmitted genetically.
It's just a theory, Peter.
Any surveillance?
No cameras inside or on the street.
Could be why our suspect chose this place.
No candles, I suppose?
Not a single one.
Now, Walter...
...is there any other way that this toxin could be delivered?
Any number of ways, I would think.
It simply requires a...
...heat source to disperse it into the air.
What about a cup of tea?
Oh, yes, thank you.
Oh. Oh, yes.
That would work...
...as long as the water was hot enough.
Cinnamon.
I want this cup dusted for prints immediately.
Yes, sir. Right away.
Peter...
...can you help me?
That man there.
What color are his eyes?
Brown.
Then I was right after all.
It is a targeted toxin.
They all have brown eyes.
That's the common genetic trait.
Check the survivors, but I'm sure I'm right.
It's a good thing you weren't here at the time agent Broyles, or you'd be dead too.
So, first it was a family. Now it's people with brown eyes. Why is he targeting these people?
You said you think it's an experiment. So, what?
He's just killing these people to prove that he can?
Perhaps.
I'm going to drive us back to the lab.
- I think I have an idea. - Walter.
Why don't I drive?
An idea about what?
I don't know yet.
Excuse me, officer.
That man over there.
His name's Bischoff?
You mean Dr. Bishop.
Dr. Bishop.
Did you need something?
No, I'm just trying to place him.
He looks just like his father.
Oh. Is that the tea cup?
Yeah.
But they could only pull a partial print...
...so no good to run through any databases.
That's unfortunate.
But you are just in time.
Just in time for what?
Show and tell, apparently.
This is a molecular model...
...of the toxin.
This blue portion, that's the deadly part.
This red part...
...that's the targeted group.
In the first instance, the Staller family. Agent Farnsworth?
And in this instance...
...people with brown eyes.
Because he can program the toxin to target whatever group he wants.
Any group with common physical characteristics, or genetic similarities, yes.
Tall people. Short people.
Fat people. Skinny people.
Black people. Brown people. White people.
Hey, Walter.
We get it.
Well, anyway...
...whoever created this was apparently proud of his work.
Though I don't know why he should be, I mean...
...apart from the genetic targeting, the toxin itself is quite rudimentary.
It's a blend of chromium trioxide and...
...and hydrogen cyanide. It's..
Chromium trioxide.
That's highly regulated. If this guy was buying it in any quantity--
- Astrid, can you-- - Dig up any companies...
...that deal with chromium trioxide.
So, Walter, what were you saying about him being proud of his work?
See this?
That's a carbon chain. It's inert.
It's the signature of the creator.
Some chemists spell out their initials in molecules, others create a symbol.
Are you saying that we may be able to identify whoever made this?
Oh yes, but this could be anybody's.
Well, it looks like a...
...a stylized "S" or a snake.
Actually...
...looks more like a sea horse to me.
A sea horse. I suppose it could--
What is it?
"Das seepferdchen".
The sea horse.
I know who created this toxin.
Hey, Walter.
Wait, Walter. What's going on?
They called him the Sea Horse because he was a great swimmer.
Okay, good for him.
Who is he?
My father.
Dr. Robert Bishop.
Wait, wait, wait. Your father?
I told you these were Nazi experiments.
My father was a scientific pioneer at the University of Berlin.
Yes, I know. Who came here in 1933...
...which is long before the Nazis ever took power.
It was 1943.
Given the nature of his work, I fudged the date a little.
Walter, what are you telling me? That my grandfather was a Nazi?
Technically, yes.
Actually...
...he worked as a spy for the Allies...
...sabotaging German research and...
...smuggling scientific information to the Americans.
I knew I recognized the experiment.
I must have seen the formula in one of my father's books.
- Put this there. - Okay.
Walter, are you saying you think your father helped develop the formula for this toxin?
It would seem so.
Of course, at the time, it was just theoretical.
DNA itself was theoretical.
But that formula has to be here somewhere.
These are all my father's favorite books.
First editions of Goethe, Thomas Mann.
And you're sure that all those notes were hidden inside of German novels?
Oh, yes.
It was the only way he could smuggle them out of Germany when he left.
- You're not gonna find those books in there. - No, they will be here.
These are all the books from my library.
No, they won't.
Walter.
They're not in there.
I sold those books.
All of them. About 10 years ago.
You sold them?
Why?
I needed money.
Money?
They were my books.
He left them to me.
He knew how dangerous they were.
The odds that this case has anything to do with your father--
The very thing that he was trying to stop...
...you put back into the world.
- We don't know that for sure. - Yes, we do.
Of course we do.
How else would whoever is doing this have gotten hold of the formula?
And because I failed to protect it...
...my father's work is killing people.
So the killer is using a toxin based on a formula created by Dr. Bishop's father.
Just another skeleton in the Bishop family closet.
It's in a book I sold.
So the formula's very complex.
We believe that the killer must have found it in one of the books.
If we can trace the books, then hopefully we can find him.
Then do it. Quickly.
Okay.
We'll find those books.
Come on, Bishop...
...you sold me those books, like, 10 years ago.
How am I supposed to know where they are now?
Because, Markham, you're exactly the kind of fastidious packrat...
...who keeps a handwritten log of every book he's ever sold.
Such a way with words.
How is it that a beautiful lady like you is stuck with this guy?
It's my job.
Well, I got plenty of books on how to rethink your career.
"What color is your parachute?"
"Do what you are".
That's thoughtful of you.
I really need you to find out who it was who bought those books.
Whoever did may be in the midst of a killing spree.
Sounds serious.
Give me a minute, I'll see what I can find.
What?
You didn't really sell Walter's books for money, did you?
Walter's got heaps of valuable stuff. Why did you just sell his books?
It was a long time ago.
Walter was still in St. Claire's. I wasn't exactly very fond of him at the time.
Those books were amongst his favorite possessions.
And, no.
To answer your question...
...I'm not proud of it.
They were sold last year.
The name I got is Eric Franko.
Lives over in Kendall Square.
He struck me as a real weirdo.
Coming from you, that's saying something.
I owe you one.
Doesn't look like he's here.
Well...
...why don't we just poke around for a bit?
Freeze. FBI. Get down on your knees.
Don't shoot me.
Please, don't shoot me.
I'm not a Nazi.
I'm an artist.
It's about the banality of evil...
...like the Nuremberg Trials.
Showing history's tyrants as these...
...regular schmucks.
That's deep.
Where are the books you bought from Markham?
The German novels?
The ones with all the creepy stuff inside?
The "Alice in wonderland" meets the...
...the evil Nazi experiment?
Well, you're looking at one of them.
So, what do those books have to do with the FBI?
It's a long story.
So none of these have ever been displayed?
You're the only person who's ever seen them?
Sadly, the contemporary art scene has yet to...
...fully recognize my particular contributions.
I'd like to get these books back or...
...what's left of them. I'll pay whatever you had to pay for 'em.
Yeah, sure, sure.
It's gonna take me a while to dig them all up...
...but you should also know the...
...collage is for sale.
Or I could donate it.
Your grandfather was a fan of modern art.
But I don't think he would've appreciated this.
I'm sorry, Walter.
Apology not accepted.
Of course, this means the perpetrator didn't get the formula from the books.
No.
We don't see how he could have.
Then how on earth did he re-create the formula using my father's signature no less?
No match on the killer's DNA, Walter.
Great. More bad news.
Wait, I don't understand.
His DNA? Where did you get his DNA?
Dr. Bishop was able to get some from the partial fingerprints.
From the skin cells in the oil.
It's pretty amazing.
Not my best work, I'm afraid.
The telomere degradation suggested that the man was over a hundred years old...
...which is fascinating, but not a likely possibility.
Hey Walter.
You said this toxin could be programmed to target any genetic trait, right?
- Yes. - Well, could it be programmed to target more than one?
Say, green eyes and brown hair at the same time.
Yes, I suppose it could.
What are you thinking?
Das herrenvolk.
The master race.
The Nazi's ultimate goal: the purification of the German people and the white race.
So Nazi science for a Nazi agenda.
All of Hitler's dreams in one little toxin.
Hey.
What are you doing there?
I'm conducting a test.
To monitor the dispersion rate of my experiment.
Please.
You can watch.
Walter.
What are you doing to those rats?
Killing them.
Well, hopefully only the white ones.
I thought you were trying to block the toxin.
I am. But I have to replicate it before I can figure out how to stop it.
Astrid couldn't find any companies that purchased chromium trioxide within the past six months but...
...our EPA contact suggested we search for sodium chromate?
Of course, it's a sister compound. You...
...treat it with sulfuric acid, you get chromium trioxide.
Okay, well, here are three local buyers. Do you recognize any of them?
Well, those two, pharmaceutical companies.
This one I've never heard of.
Shipping address is 3340 Eastham Rd.
Newton, Mass. That's a residential address.
Sir, it's Dunham.
I think we have a location.
Clear!
Are we clear, Agent Doble?
The area's safe.
Good!
All clear!
Tell tactical to stand down.
Nothing over here.
Makes your lab look downright homey.
Schwarzes haut.
Braunes haut.
Grune augen..
Genetic traits.
Eye color...
...hair color, skin tone. It's the works.
Creating the master race by process of elimination.
Guys, I think I found something.
Looks like he was making some kind of ID.
Walter, this is your sweater.
Walter?
Walter!
Get him out of here. We need some help downstairs!
We need that oxygen now.
Breathe. Just breathe, Walter. Breathe.
Breathe.
Thank you, sir.
And your ID, sir?
Yeah, just what he said.
Walter, how are you feeling?
You got me out just in time.
I'd like my sweater back.
We'll work on that, Walter.
Walter.
Why did he go after you?
Don't know.
Perhaps he knew my father betrayed the Nazis.
Would you able to get that photo to Broyles?
Yeah. He's sending it out wide.
I also found this.
I know that logo.
I have to check the contents of the box.
Empty your pockets, please.
Of course.
All right, go ahead.
It's the annual World Tolerance conference at the Boston Center for performing Arts.
Do you know who he's planning to target?
No with that broad a spectrum of genetic markers, the target group could be anybody.
- We need to evacuate the building. - I'll call the head of security.
But there are any number of foreign dignitaries at that conference so we need to follow protocol.
- That'll take time. - We may not have it.
There are many difficulties...
...but we must continue to confront discrimination, and uphold the rights of the oppressed.
The theme of this year's conference, individual and cultural events...
...was not chosen lightly.
This organization has a proud tradition of upholding human rights...
...and cultural diversity.
Together we are committed to the promotion of tolerance.
Walter?
Whenever you're ready I'll...
...take you home.
No.
I want you to take me to the Performing Arts Center.
I can stop this.
Okay, we're looking for the man or the mechanism.
It's gonna be something hot. A candle, a coffee urn.
FBI.
So.
Now, remember, he could be anywhere.
On the floor...
...in balconies, anywhere.
Peter, there's a candle on every table.
I know. They've been burning for so long.
There's no victims, he must be using something more potent.
Walter, the conference is this way.
No, Astrid.
We need to take the higher ground.
This is Gatrell. I'm in the northwest corner. I got nothing.
Nothing here either. Keep circulating.
..difference of values...
...of religions...
...and of lifestyles.
We must take great care...
...lest our advocacy become its own form of oppression...
...one that unjustifiably takes sides--
Olivia, I'm in the bar.
Could be anything back here.
Candles, coffee pots.
It's a disaster.
Hold on a second.
Peter?
Let's hold off on those for one second.
By recognizing room for doubt....
I think I got it.
We are united by a common--
Where's the victim?
- Okay, FBI. Everybody move, please move. - Move.
- Make room. - I said move. Get out of my way.
I need a paramedic.
Bischoff.
Traitor.
Dr. Bishop.
Yes, Agent Broyles?
- What you did tonight-- - Was to use the killer's...
...DNA to target him, and only him...
...using his own toxin.
If you plan to press charges, then so be it.
But I don't regret what I did.
Good night, Dr. Bishop.
Olivia?
That man...
...he corrupted my father's work.
- I understand. - No, no, it was more than that.
You see...
...family is very important to me.
There's nothing I wouldn't do.
- What's this? - It's a present.
Your father's work. I had Franko give me everything that wasn't totally destroyed.
Oh, look, Peter.
It's your grandfather.
Robert Bischoff?
That was his name.
Changed it when he came over here.
Your mother always said...
...that you shared his noble brow.
It's a pity you never got to know him.
You two would've gotten along very well, I think.
You know, there is still one thing that doesn't make any sense.
If the formula for the toxin didn't come from your father's notes...
...how did this guy get it?
Perhaps there's some mysteries that are destined to remain unsolved.
Thank you for bringing these back.