“- Dr. John Lanyon: You told me you became that monster tonight not of your own accord. It will happen again.
- Dr. Henry Jekyll: It never will. I'm sure of it. I'll conquer it!
- Dr. John Lanyon: Too late. You cannot conquer it. It has conquered you!”

Holmes Herbert - Dr. John Lanyon
Fredric March - Dr. Henry Jekyll

“How can someone torture a child? How do you erase that sound from your head? Those two are creatures, they're not human beings.”
James Sikking - Dr. Harold Lewin

“The Monster had escaped and was ravaging the countryside, killing, maiming, terrorizing. One night he burst into our house. My father took a gun and fired at him but the savage brute sent him crashing to a corner.”

Lionel Atwill - Inspector Krogh

“- Tad Trenton: Can he get us in here?
- Donna Trenton: No.
- Tad Trenton: Can he eat his way in here? Can he?
- Donna Trenton: No.
- Tad Trenton: Wish he was dead.
- Donna Trenton: Me too.”

Danny Pintauro - Tad Trenton
Dee Wallace - Donna Trenton

“- Merlin: What are you afraid of?
- Arthur: I don't know.
- Merlin: Shall I tell you what's out there?
- Arthur: Yes, please.
- Merlin: The Dragon. A beast of such power that if you were to see it whole and all complete in a single glance, it would burn you to cinders.”
Nicol Williamson - Merlin
Nigel Terry - King Arthur