Why did Barbara bain and martin landau leave mission impossible?

Barbara Bain and Martin Landau left "Mission: Impossible" after the show's third season due to contract disputes over pay and creative differences with the producers. They sought higher salaries and more significant roles for their characters, which led to tensions Behind the Scenes. Their departure marked a significant change in the show's dynamics, as they were iconic characters in the series. Subsequently, the show's format and cast evolved to incorporate new actors and storylines.