Final film of Estelita Rodriguez. She died that same year under mysterious circumstances.
Final film of director William Beaudine.
Produced as part of a double feature with Billy the Kid vs. Dracula which was also directed by William Beaudine.
Shot in eight days.
The first time that Igor is spelled with an "I". In Son of Frankenstein and The Ghost of Frankenstein the character's name was spelled "Ygor".
The lab equipment was provided by Ken Strickfaden, who used the same gadgets in the Frankenstein films made by Universal, as well as Mel Brooks' Young Frankenstein. This is one of the few times the equipment was filmed in color.