A prison movie masquerading as a spy story, this episode features a young Paul Winfield as the unofficial leader of a prison gang. Disguised Jim and Barney join the prisoners to unmask the traitor whom everybody thinks they already know. The trustee who is so free to move about must be in cahoots with the jailers and responsible for the shooting of a prisoner who tried to escape. Except he isn't. He is a virtuous resistance leader, who, for reasons too complicated to explain, is more useful to the movement in prison than out. Jim and Barney must appear to join in the torture of the innocent while they wait for Rollin to find and pass on the evidence that will clear him. Jim receives the note just in time to stop the gang from killing the wrong man. The real traitor, a mild-mannered fellow who sculpts animals and betrays his friends using cigarette foil, gets his just desserts as Cinnamon the "Red Cross lady" is arranging the IMF's escape.