Hogan's Heroes (1965)

S3E10 One in Every Crowd

Title: A Hidden Betrayal Plot: Hogan and his team embark on a mission to neutralize the Germans' newly developed S-5 cannon, stationed at Stalag 13. However, their operation takes a shocking turn when they discover there's a mole in their midst—someone who has tipped off Colonel Klink about Hogan’s sabotage plans. The threat of betrayal looms over their mission, complicating their efforts to thwart the enemy.