The Bun and Oven Wards are open at Finisham Maternity Hospital. The 23rd film in the Carry On series and the fourth (and last) of the medical themed adventures. Sid Carter (Sid James) leads a gang of thieves who plan to break into Finisham Hospital and steal a load of contraceptive pills to sell abroad. But where are they kept? Sid decides to send his son Cyril (Kenneth Cope) in undercover disguised as a nurse... They probably seem like cheap gags now, but much mirth is mined from the scenarios set up by a man undercover as a female nurse. Cue him having to share a room with a foxy babe...