Fourth entry in the 'Carry On' series. Police Sergeant Wilkins (Sid James, in his 'Carry On' debut) has a new batch of inept recruits on his hands, whose idea of covert surveillance involves dressing up in drag. Bumbling PCs include Kenneth Williams, Charles Hawtrey, Kenneth Connor and Leslie Phillips.

This was the second 'Carry On' film, and a hit in the United States. The patients in a men's hospital ward decide to revolt against the staff, as led by the indomitable Matron (Hattie Jacques). Troublesome patients include Kenneth Williams, Leslie Phillips, Kenneth Connor and Charles Hawtrey. Producer Peter Rogers was offered a five-movie deal on the strength of this film's success.