Draculas Bluthochzeit mit Frankenstein

J. Carrol Naish was very old and frail at the time this film was made and, as a result, he could no longer remember dialogue, so he read his lines in it off of cue cards. However, he had only one working eye; the other one had been replaced with a glass eye long ago. In Naish's close-ups in the film with dialogue, one eye can be seen moving back and forth when he is reading his lines, while the other eye does not move at all.

J. Carrol Naish's character of Dr. Durea / Dr. Frankenstein first refers to Lon Chaney Jr.'s character as "Grodin," although his name in the film is actually "Groton." After that one time, Naish gets it right from that point onward.

For his bit part of Dr. Beaumont in this film, Forrest J Ackerman's first name is misspelled in the credits as "Forest."

According to the film's co-director and co-writer, Samuel M. Sherman, its TV version removed the brief topless nudity of the girl on Dr. Durea's operating table. It also removed a sign that said "Society Sucks".

Edited into FrightMare Theater: Dracula vs Frankenstein (2018)