A deadly explosion in central London devastates the world of U.S. Ambassador Kate Wyler (Keri Russell). As Kate struggles to rebuild her shattered life and shattered team, her worst fears come to light: the attack that led to her being sent to the UK came not from a hostile nation, but from within the British government. Her only real ally in her quest to uncover the truth is her soon-to-be ex-husband, Hal Wyler (Rufus Sewell)—who is not only alive and well, but also involved. Kate faces a rocky marriage, a complicated relationship with British Foreign Secretary Austin Dennison (David Gyasi), and a threatening visit from Vice President Grace Payne (Allison Janney). Mansions, state secrets, treason, afternoon tea—the Emmy-nominated series The Diplomat returns for a second season from creator, showrunner and executive producer Deborah Kahn. Executive producers are Janice Williams, Alex Graves and Keri Russell. The cast also includes Ari Ann, Rory Kinnear and Aitor Esando.