Michael Caine and Roger Moore play dual roles in this crime comedy directed by Michael Winner. Con men Sidney Lipton (Caine) and Gerald Bradley-Smith (Moore) decide to perpetrate a heist disguised as corrupt nuclear physicists Dr Daniel Hicklar and Sir John Bavistock to steal the scientists' secret formula. Meanwhile, the real scientists (also Caine and Moore) are, unknown to their impersonators, trying to sell the formula to the highest bidder. The cast also includes John Cleese, Patsy Kensit, Sally Kirkland and Jenny Seagrove.