“- The Scarecrow: The sum of the square roots of any two sides of an isosceles triangle is equal to the square root of the remaining side. Oh joy! Rapture! I got a brain! How can I ever thank you enough?
- The Wizard of Oz: You can't.”
Ray Bolger - The Scarecrow
Frank Morgan - The Wizard of Oz

“You know everything about the human brain except the way it works.”

David Oyelowo - Steven Jacobs

“- 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

“- Ygor: Whose brain?
- Ludwig Frankenstein: Kettering. A man of character and learning. The monster will cease to be an evil influence and become everything that is good.”

Béla Lugosi - Ygor
Cedrick Webster Hardwicke - Dr. Frankenstein

“- Ludwig Frankenstein: Your dream of power is over, Bohmer. You didn't realize his blood is the same type as Kettering's, but not the same as Ygor's. It will not feed the sensory nerves.
- The Monster: Bohmer! You played me a trick! What good is a brain without eyes to see? What good is a brain without eyes?”

Cedrick Webster Hardwicke - Ludwig Frankenstein
Lon Chaney Jr. - The Monster