A lowly BBC employee pulls a prank at the studio and finds himself transferred to an isolated island where he is to set up a weather station at a lighthouse. As if in a fantasy, a ship carrying a bevy of beautiful models is shipwrecked off the coast and the models wind up on the island. However, when the models begin disappearing, the "back-room boy" investigates and finds a sinister scheme involving spies and Nazi battleships.

A hapless fire crew are given the ultimatum: put out a fire successfully or else be sacked. They fail miserably, and their ancient fire engine is stolen by criminals attempting to steal the crown jewels from the Tower of London.

A disgraced school master, Benjamin Twist, is mistaken for a tough prison governor and assigned the charge of a prison for particularly hardened criminals. Believing he is being sent to a school rather than a prison, he celebrates accordingly only to find that his drunkenness accidently lands him on the wrong side of the prison bars. The Governorship is eventually restored to him, and he sets about popularising himself amongst the convicts by turning a blind eye to their shady dealings.

Turnbottom Round prides itself as the village without crime; there has not been an arrest recorded by the local police for years. Unfortunately, this is more to do with the inability of Sgt Dudfoot and his constables Jerry and Harbottle to so much as recognise a crime. With their jobs on the line, the trio attempt to stage a crime of their own, only to inadvertently uncover a smuggling ring and a headless horseman...

Through the influence of a relative, a hopeless railway employee is made stationmaster the sleepy Irish station of Buggleskelly. Determined to make his mark, he devises a number of schemes to put Buggleskelly on the railway map, but instead falls foul of a gang of gun runners.

Will Hay plays a bragging sea captain whose maritime experience actually extends to navigating a coal barge down inland waterways. His tall tales catch him out when he is co-erced into commanding an unseaworthy ship by an unscrupulous shipping agent who means to have it wrecked. This was the first film to couple Will Hay with both Moore Marriott and Graham Moffatt.

The Crazy gang invade Nazi Germany !! They accidentally pilot a balloon over enemy territory.