Howard Goorney is dubbed.
Hammer stalwart Terence Fisher was originally slated to direct the film, but had to bow out after an automobile accident, leaving cameraman Freddie Francis at the helm.
In The Curse of Frankenstein, Hammer were barred from copying any details from the Universal films of the 1930s and '40s, including the famous monster make-up. This film, however, was distributed by Universal, and so Hammer had free rein to copy elements from the Universal franchise, most noticeably the creature's make-up and the laboratory sets.
When first shown on television in 1968, some theatrical scenes were replaced by less intense scenes filmed by another director and with extra actors included.