Spurned by Joyce, Leonard is hitting the bottle. His carelessness results in an injury to Harry's foot, making him unable to go out on the road. It's Bank Holiday, so Leonard goes out on patrol while Harry looks after the office. After becoming bored with filing and inventories, Harry pretends to be Leonard while answering the phone. He gives Headquarters the impression that his men are ""on the verge of mutiny"". They are alarmed and send someone to investigate. Harry has to continue the pretence of being Leonard. Meanwhile the real Leonard Spanwick is having problems with a Maserati — and its owner. Leonard later has to ""carry the can"" for Harry's dealings with Headquarters. He gets his revenge by locking Harry in a cupboard and making him miss his date with Catherine.