While on a sabotage caper, Hogan and Carter encounter a German general, overpower him, and smuggle him back to Stalag 13. Once there, they come up with a ploy to trick the disoriented general into revealing his troop's attack plans.

Several attempts by Hogan and his men to destroy a German bridge end in failure—until they decide to use the Nazis' own ammo to accomplish the task!

A secret military document is mistakenly hidden in Colonel Klink's topcoat at a party, and a desperate Hogan must nab the document because of both its value to the allies, and because Klink will be charged with treason and replaced at Stalag 13 if it is discovered in his possession.

Klink becomes convinced that he is marked for assassination by a mysterious "Mr. X" after a series of close calls at the stalag.

When Sergeant Carter constructs an amazingly complicated rabbit trap, a suspicious Colonel Klink comes to believe that the contraption is a secret electronic spying device.

The clumsy and annoying Colonel Crittendon inadvertently messes up Hogan's plans to destroy a German ball-bearing plant.