Get Smart (1965)

S3E24 The Hot Line

The Chief finds himself unexpectedly stripped of his position when he receives a call from someone posing as "the President"—in reality, it's Gorshen, a master of Kaos impersonation. In a shocking twist, Max is appointed as the new Chief. This maneuver is part of Kaos's scheme to undermine and ultimately dismantle Control, but with Max at the helm, they realize they no longer need a complex strategy.