Mission: Impossible (1966) : 3x18

Selby, a double-agent for the U.S. within an enemy country's intelligence service, is suspected by his superior, Kellerman. The IMF must keep Selby in the clear and eliminate Kellerman. Selby complains when Marceau, a courier who knows about Selby's identity, is taken from him by Kellerman. Selby claims Kellerman is the double-agent. Rollin, as a government official, gives Kellerman 24 hours to break Marceau. Using his underling Brocke, Kellerman works with Rollin to trap Selby. Kellerman comes to believe that Agent Jim has kidnapped Brocke's girlfriend to force Brocke to give away Marceau's location to Selby. In reality, Stephanie is shown a fake split-screen of Jim conspiring with ""Kellerman"" (Rollin in disguise on tape!) to kill Brocke and eliminate Marceau. Brocke believes Stephanie and accuses Kellerman but she recants under pressure. Meanwhile, Marceau is wired to an explosive. When Stephanie recants the IMF break in using knockout gas and use liquid nitrogen to free Marceau. The