Austin Dennison has returned for the fourth season of the political thriller series 'The Diplomat'. 'The Diplomat', with Keri Russell and Rufus Sewell, has received a 100% Rotten Tomatoes score. It explores international relations through dramatic storytelling and has garnered interest from both critics and viewers. The U.K. Prime Minister, who plays a key role in the show, has revealed how he learned of his 'shocking' storyline for Season 4 in an operatic manner.