“- Ygor: You're going to help him Doctor? You are giving him life?
- Ludwig Frankenstein: Yes but not for the purposes that you think Ygor. I'm giving him strength so that an operation may be successful.
- Ygor: An operation?
- Ludwig Frankenstein: Yes. I'm giving him another brain.”
Béla Lugosi - Ygor
Cedrick Webster Hardwicke - Dr. Frankenstein

“- Ullman: Don't kill me!
- Doctor Gustav Niemann: Kill my trusted old assistant? Why, no. I'm going to repay you for betraying me; I'm going to give that brain of yours a new home in the skull of the Frankenstein monster.”
Frank Reicher - Ullman
Boris Karloff - Doctor Gustav Niemann

“- K. Edgar Singer: I'm afraid we're going to have to perform an invasive quadrilobal brain probe on you and pluck it from your head.
- Gonzo: The information?
- K. Edgar Singer: No, your brain.”
Jeffrey Tambor - K. Edgar Singer
Dave Goelz - Gonzo

“It kill your brain cells, son. It kill your brain cells! Now when you're destroying your brain cells, your doing the same thing as killing yourself. You just doing it slower! Now, I say, if wanna kill yourself, don't fuck around with it. Go on and do it expeditiously!”

Morgan Freeman - Principal Joe Clark

“I'm going to blow that shit you call brains all over my partner here.”
Charlie Sheen - David Ackerman