Revealing mistake: Near the beginning, Hengist and Horsa are watching a young cave couple dragging each other around. Hengist is pouring Horsa a drink and you can see him pour, raise the jug, then Horsa takes a sip from his cup. All this time it is patently obvious that no liquids are in the vessels.
Carry On Cleo (1964)
1 revealing mistake
Directed by: Gerald Thomas
Starring: Kenneth Williams, Sid James, Charles Hawtrey, Sidney James, Kenneth Connor
Genres: Comedy
Factual error: Towards the end of the film, the British slaves are escaping out of the window. As they rush over to the window, one man's costume flies up. Lovely pair of red underpants he's wearing.
Mark Antony: All right, look here Marcus.
Spencius: No, no, I'm Spencius. 'S my brother what's Marcus. We're in partnership now, you know. Marcus and Spencius.
Trivia: Charles Hawtrey plays Seneca, father of Calpurnia (Joan Sims). In real life, Hawtrey was only 16 years older than Sims.