Encompassing three hugely popular double acts, The Crazy Gang were one of Britain's best-loved, most enduring variety troupes – their antics delighting audiences for over three decades from the early 1930s and their career taking in numerous Royal Command performances. Their efforts to save a struggling circus provide the laughs in this uproarious comedy, also starring Goldfinger icon Shirley Eaton and featuring Flanagan and Allen's rendition of their greatest hit, Underneath the Arches. The Crazy Gang have been jacks-of-all-trades with Joe Winter's Monster Circus for almost as long as Joe has been on the road, and they're still hoping for a big break. But Joe has hit hard times: his equipment is mortgaged, most of his acts have deserted him and even the elephants have walked out. So the Gang set about finding a way to save the circus... and come up with a typically novel solution!

It's war time London and the Crazy Gang (Flanagan & Allen, Nervo & Knox, Naughton & Gold) are doing their bit for the war effort by running a fish and chip stall using their platoon's barrage balloon for advertising. Their Sgt Major is not happy about this and orders them to take the balloon down, but a freak heavy wind accidentally carries the gang away to Nazi Germany. They are captured and placed in a detention camp where they meet an elderly prisoner named Jerry, who possess a map for the location of a secret weapon which will win the war! Fortunately Teddy Knox's impersonation of Hitler lands him the spot of pretending to be the Fuhrer at a gala dinner and the gang are allowed out of the camp. However the Nazis have other ideas for their substitute leader.

The Crazy Gang join the 1898 gold rush. Unfortunately it's now 1939 and they're a bit late.

Alf discovers that one of the buttons on his pyjamas is made from the metal of Aladdin's lamp and that when he cleans it a genie appears.

Hyman Goldberger, the president of film studio Super-Colossal Pictures, is in trouble--his major backer is threatening to stop financing his pictures. He finds a group of six wealthy individuals who may want to become investors in the studio if his disgruntled backer pulls out. Unfortunately, his bumbling runner Albert picks that day to invite six of his street musician friends to be in the film that is currently shooting at the studio, and Hyman mistakes them for the potential investors. Complications ensue.

A soldier discovers a button made from Aladdin's lamp grants wishes when rubbed.

A major and his wife return from abroad and pose as servants to observe their adolescent children.