The first images from The Diplomat season reveal a West Wing reunion, in addition to giving the first glimpses of Keri Russell and Rufus Sewell returning as Kate and Hal Wyler. The Diplomat season 3 is set to premiere on Netflix later this year, picking up after a shocking cliffhanger that saw Janney's character, Grace Penn, go from Vice President to U.S. President. The political thriller, from West Wing creator Debora Cahn, has more surprises on the way.