Mission: Impossible (1966)

Season 1: Episode 3

Imry Rogosh is a mass murderer who kills to forment political upheaval. He is targeting Los Angeles, so the IMF knock him out in a car accident. When Rogosh ""wakes up"" he is in a cell in a prison in his own country, three years later, and ready to be executed as an American agent. To "prove" his loyalty to the cause, Rogosh has to spill the information on his secret operation, but during the mock trial a slip-up cues him in on the ruse. Briggs has to act fast to get Rogosh to reveal the plan to kill the citizens of Los Angeles.