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.
Bud Flanagan
Chesney Allen
Jimmy Nervo
Teddy Knox
Charlie Naughton
Jimmy Gold
Moore Marriott
Wally Patch
Peter Gawthorne
Frederick Valk
Eric Clavering
Anthony Eustrel
Carl Jaffe
Manning Whiley
Torin Thatcher
Irene Handl
Felicity Andrae
Rolf Brandt
Richard Morrell
Gerald Cooper
Rowland Douglas
Frank Henderson
James Knight
Henry B. Longhurst
John Lothar
George Merritt
Pat Noonan
Gerik Schjelderup
Leonard Sharp
Mavis Villiers
Theodore Zichy