Netflix has announced that the third season of The Diplomat will premiere on October 16, 2025. The political thriller stars Keri Russell as Kate Wyler, a career diplomat whose professional responsibilities frequently collide with her personal life.
The new season picks up after the events of season two, which ended with the death of U.S. President William Rayburn and the sudden rise of Vice President Grace Penn (Allison Janney) to the presidency. Wyler and her husband Hal (Rufus Sewell) are among the few who know the circumstances surrounding Penn’s actions and their consequences, setting the stage for new tensions inside the White House. Bradley Whitford also joins the cast this season as Penn’s disgraced husband Todd.
Created by Debora Cahn, The Diplomat has been praised for its mix of espionage, political intrigue, and character-driven drama, with the first two seasons earning strong critical and audience reception. Season three continues to expand the show’s focus from international crises to the highest levels of U.S. politics.
The Diplomat season three premieres globally on Netflix October 16.