A scientist invents a pill to cure smokers of their nicotine addiction. However, when he makes his discovery public, he encounters strong resistance from the tobacco industry.

Flirtatious mermaid Miranda swaps places with a schoolteacher who has gone on holiday. All is well until she falls in love with a human.

An American movie company wants to shoot a science-fiction film using a British army barracks as a location, and its soldiers as actors.

A newly-arrived army chaplain is put in charge of camp entertainment and has the idea of putting on a Brains Trust with local notables. Unfortunately for him, it emerges from a question on the rights and wrongs of marriage that there is more going on between three of the panelists than he wants to know about - though the audience obviously thinks differently.

At the outbreak of WWII the British realise they can't prevent the invasion of the Channel Islands. However, someone realises that a prize cow is on the islands and the Nazis mustn't get hold of her. This is the intrepid story of the cow-napping from under the noses of the Nazis.