A sequel to the film, titled
El Secreto del Dr. Orloff ("The Secret of Dr. Orloff", also released as
The Mistresses of Dr. Jekyll) and also directed by Franco, was released in 1964. Despite the title, the film had no direct storyline connection to its predecessor, instead featuring a new mad scientist character called
Jekyll. The "Dr. Orloff" was reused by Franco in several subsequent films, usually with Vernon reprising the role: •
Only a Coffin (1967) •
Orloff and the Invisible Man (1970) •
The Sinister Eyes of Dr. Orloff (1973) •
The Sinister Dr. Orloff (1984) •
El siniestro doctor Orloff (1984) •
Faceless (1988) Franco also reused footage from
Awful of Dr. Orloff in
Revenge in the House of Usher, which starred Howard Vernon as a different character. == References ==