Final film in the "Carry on..." franchise to be shot in black and white.
Barbara Windsor recalled that while filming the scene on the conveyor belt, Charles Hawtrey fainted. She thought it was due to fright, but it turned out that he was drunk. A unit nurse innocently asked if anyone had tried giving him a tip of brandy, to which Kenneth Williams scoffed, "That's the last thing he needs, dear."
The movie spoofed the Ian Fleming spy and criminal organization acronym, such as SMERSH and SPECTRE from the James Bond films, and UNCLE from the movies and TV series. These acronym spoofs in this picture were BOSH, SNOG, SMUT and STENCH. Their meanings are as follows: BOSH: The British Operational Security Headquarters; SNOG: The Society for the Neutralisation of Germs; SMUT: The Society for the Monopoly of Universal Technology and STENCH: The Society for Total Extinction of Non-Conforming Humans.
First ever James Bond spoof movie.
The name of the Doctor Crow character was a spoof of the name of the title character from the James Bond film Dr. No (1962) from that movie, whilst the character name of Daphne Honeybutt (Barbara Windsor) was a parody of Honeychile Rider, also from that same Bond movie.