Tenth entry in the Carry On series. Able seaman Poop-Decker (Bernard Cribbins) signs up for adventure on the high seas with the wicked Captain Fearless (Kenneth Williams). Those swabbing the decks include Juliet Mills, Charles Hawtrey and Donald Houston. The film was originally to be entitled ´Up the Armada´, but the British Board of Film Censors objected to such a rude title.

Stodge City is in the grip of the Rumpo Kid and his gang. Mistaken identity again takes a hand as a “sanitary engineer” (plumber) by the name of Marshal P. Knutt is mistaken for a law marshal! Being the conscientious sort, Marshal tries to help the town get rid of Rumpo, and a showdown is inevitable. Marshal has two aids – revenge-seeking Annie Oakley and his sanitary expertise

Two Britons are captured and enslaved by invading Romans and taken to Rome. Hengist Pod creates useless inventions, while Horsa is a brave and cunning fighter. One of their first encounters in Rome leaves Hengist being mistaken for a fighter, and gets drafted into the Royal Guard to protect Cleopatra. Cleo doesn’t want him around and plots for his sudden demise…

The sinister Dr Watt has an evil scheme going. He’s kidnapping beautiful young women and turning them into mannequins to sell to local stores. Fortunately for Dr Watt, Detective-Sergeant Bung is on the case, and he doesn’t have a clue! In this send up of the Hammer Horror movies, there are send-ups of all the horror greats from Frankenstein to Dr Jekyl and Mr Hyde.