Mission: Impossible (1966) : 5x14

Phelps must stop Charles Peck from using violence, created by professional provocateur Billy Walsh, to elevate his puppet, Mayor Steven Tallman to the governorship. Dana is a provocateur herself, arrested by Barney the current governor's representative. Walsh gets Dana out, and Paris is a blackmailer who convinces Tallman that Dana is his previously-unknown illegitimate daughter. Peck is concerned that Tallman (actually Paris in disguise) will confess their plans to save his ""daughter"", and orders Walsh to kill Barney and Dana. Barney stops Walsh on TV before he can blow up a crowd of demonstrators and police during a protest, and Paris-as-Tallman confesses to Peck's involvement.