When Hogan and his men set out to destroy the Germans' new S-5 gun that's being guarded at Stalag 13, they uncover more then they bargained for—a traitor amongst their ranks who has gone to Colonel Klink to report on Hogan's planned sabotage.

"Kinch" agrees to fight a German boxing champ to divert attention from a heist that Hogan is planning.

When three Gestapo officers detain Hogan and Carter, the two frantically plan their escape --- until they learn the officers want to defect.