Originally supposed to be filmed immediately after Police Academy 3: Back in Training (1986), but production was held up by the death of Part 3's director, Jerry Paris.
The official movie poster depicts Michael Winslow with a moustache, despite him not having one in the film. This same goof was made in Police Academy 5: Assignment: Miami Beach.
What are the differences between the British BBFC PG VHS and the Uncensored Version?
A
Although the movie had been released uncut in British cinemas, the scene in which Mahoney is visibly holding to the camera and opening the super glue was cut out for the BBFC PG VHS tape release. A detailed comparison between both versions with pictures can be found here.