Mission: Impossible (1966)

Season 1: Episode 4

The IMF team goes in as a circus team to rescue Anton Cardinal Vossek, who is being held in the impregnable Seravno Prison. Vossek is the leader of the country's freedom movement, in rebellion against Colonel Scutari, and is awaiting a fake trial before execution. With the aid of circus acrobat Crystal Walker, the team must get Vossek out. To do so, Rollin fakes being a pickpocket so as to be arrested. Once inside Servano, he has to sneak through the prison and get Vossek out of his cell as a test run for the next day...only for the guards to interrupt at an inopportune moment.