The Diplomat will return for a fifth season. Netflix has confirmed the renewal of Debora Cahn’s series, as the fourth season continues the confrontation between Kate Wyler, President Grace Penn and Hal, Kate’s husband, who has become vice president.
In the wake of Season 3, Kate learns that Grace Penn and Hal Wyler took part in a covert operation to seize Russia's most formidable weapon. The clandestine move now threatens to drive a wedge between the United States and the United Kingdom, and could even propel Washington into a new war.
Kate is working to safeguard the diplomatic balance she helped establish between the two nations. She finds an unlikely ally in Todd Penn, the president’s husband, who shares her worries about the thaw between Grace and Hal and the consequences of their decisions.
Keri Russell reprises the role of Kate Wyler opposite Rufus Sewell, Allison Janney and Bradley Whitford. Nana Mensah, who plays Chief of Staff Billie Appiah, also joins the regular cast, alongside Ato Essandoh and Ali Ahn.
Allison Janney clinched the September 2026 Emmy for Best Supporting Actress in a Drama Series for her portrayal of Grace Penn. The award covers episodes that have already aired, but it comes as her character has become one of the driving forces of season 4.
Created by Debora Cahn, The Diplomat combines political thriller, international crisis and marital drama.
For more, check out our pick of Netflix’s new releases for October, our guide to new streaming releases across all platforms, and today’s selection: What to watch streaming today.
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