Five frightfully British children's nannies find themselves tasked with pulling off the most extraordinary theft of all time - they must steal the gigantic, 200-million-year-old skeleton of a brontosaurus from the American Museum of Natural History in New York.
Hidden somewhere in the skeleton is a microdot containing Chinese military secrets that could be vital to the survival of the British Empire.
And they aren't the only ones looking for the stolen secrets. Chinese spies and American counter-espionage agents both have a bone to pick with Nannie Hettie and her cohorts.
The Great Dinosaur Robbery is a British comedy classic that inpired the Disney film One of Our Dinosaurs is Missing starring Peter Ustinov.