The Diplomat season 4 available on Netflix on October 15
Keri Russell and Allison Janney return for eight episodes, with a teaser unveiled in August.
The video this brief is aboutThe fourth season of The Diplomat arrives on Netflix on October 15 2026, with all eight episodes available at once. Keri Russell and Allison Janney return in the political thriller, reprising their roles as Kate Wyler and the senator. The release will take place at 12 p.m. PT / 3 p.m. ET / 8 p.m. BST, which is midnight in the United States. This new season follows the explosive cliffhanger of season 3 and continues the series' annual cadence, after season 2 in 2024 and season 3 in 2025. It also benefits from the series' first Emmy, won by Allison Janney in September. The date was confirmed by Netflix on August 17, accompanied by a first teaser and never-before-seen footage. Source: What's on Netflix.