Rotten to the Core is a 1965 black and white British comedy film directed by John Boulting starring Anton Rodgers, Charlotte Rampling, Eric Sykes and Ian Bannen.

Upon finishing a prison sentence, a trio of crooks go in search of their one-time leader, known as "The Duke", who was supposed to safeguard their share of the money which was never recovered.

Leading the army group is Lt Vine who is successfully deceived by the whole affair (aided by Sara feeding him false information) and he has to bear the brunt of the blame.

The film was based on an original idea by Roy Boulting which he gained, he told The New York Times, when recuperating from a broken neck in 1964.

Anton Rodgers plays (rather well) the Peter Sellers role as the mastermind; Eric Sykes contributes his turn as a bumbling private detective; and so on, and so on.