Goofs:
Revealing mistakes: The dramatic shadow cast by the monster's hand when first discovered by Ygor in the sulfur pit comes from a light source completely at odds with the overhead light shining down into the sulfur pit in which we see the monster encased. (more)

Trivia:
The first draft of the script was written by Eric Taylor was considered too depressing. The original Taylor treatment brought Wolf von Frankenstein back into play, as well as Ygor, plus a misshapen hunchback, Theodor. Ygor's plan was to create a vengeful mob of society's rejects, ala _Freaks (1932)_, led by himself, with the Monster as brute force. A rewrite was ordered and given to veteran writer Scott Darling who retained the fundamental scenario but made significant changes. (more)

Filming Locations:
Universal Studios - 100 Universal City Plaza, Universal City, California, USA

Quotes:
Chief Constable: [the Monster recognizes Ludwig] He seems to recognize you Doctor.
Dr. Ludwig Frankenstein: [referring to the Monster] I never saw this...man before in my life. I know nothing about him.
(more)