The last of the "portmanteau" (anthology) horror films from Amicus Films. The others were: Dr. Terror's House of Horrors (1965), Torture Garden (1967), The House That Dripped Blood (1971), Asylum (1972), Tales from the Crypt (1972), and The Vault of Horror (1973).
This was the second "Amicus" horror film where Peter Cushing played the host in the framework story. The previous film being Dr. Terror's House of Horrors (1965).
Donald Pleasence and his real-life daughter Angela Pleasence portray father and daughter in the second segment.
Margaret Leighton's character, Madame Orloff, is apparently named after the mad doctor in a series of Spanish horror films that began in the 1960s, while the character herself seems to be a parody of the spiritualist Madame Arcati from Noël Coward's "Blithe Spirit."
First feature film directed by Kevin Connor who had previously been a film editor. Connor says that he got the job as director after Milton Subotsky read some scripts he had adapted with some friends. Subotsky took four of them, linked them, and offered Connor the job. Connor pointed out that he had never directed a film before, but Subotsky argued that editors made the best directors. Connor says that the film's budget was "miniscule." In the early '70s, the film business was in the doldrums and we could get a superb cast for almost minimum Equity." It was one of a number of horror movies starring Diana Dors.