Sara: I'm looking for the doctor. He's not at the institute.
Cyrus: No, ma'am. He's off in one of his trances.

Maybe you should get a team of your best detectives to look into it right away. Maybe those smart Jewish boys could have a go.

Connor [to Roosevelt]

Kreizler: I'm here today as your pupil, madam.
Madam: I didn't know you had the imagination.

What we're missing, John, is not how he kills, but why. And most importantly, when will he kill again?

Kreizler [to Moore]

The rich will always choose dead children over social scandal.

Lucius

You're right about [Moore's] standing. He won't be sitting down for a week.

Connor

Sara [to Moore]: You were missing your trousers.
Marcus: Don't worry. It can happen to the best of us.

Come on, Miss Howard, What is your opiate?

Kreizler [to Sara]

Whatever I'm doing, I'm not butchering children.

Moore [to Kreizler]

Moore: I'm sorry you had to see such a thing.
Sara: I've seen death before, but never like that.

Why can't this fiend do his work at a more reasonable hour?

Byrnes [to Connor]

Moore: How about those secret panels you use to rob clients?
Sally: You clients rob yourself when you walk in the door.

The Alienist Quotes

Moore: I'm not a reporter. I'm an illustrator.
Conner: Then that's two good reasons for you not to be going up there.

John: What can't possibly wait, Stevie?
Stevie: He said he needs you.