In an interview, Richard Wordsworth stated that in the original screenplay his beggar character was a werewolf. Hammer told him that the censor had problems with the notion of a werewolf/rapist, so out it went.

Makeup-artist Roy Ashton based his makeup for this film on Jack P. Pierce's makeup for The Wolf Man.

Over five minutes were cut by the censor for the British release and even more for the American version.

The only werewolf movie made by Hammer Studios.