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.