The Diplomat
Thursday
15
October 2026
S4E1 · Episode 1
Amid an international crisis, a US diplomat contends with her high-profile job as ambassador to the UK and her strained marriage to a political star.
The Diplomat Season 4 Episode 1 airs Thursday, October 15, 2026. Track your progress and get a reminder before air time — free, no ads.
Cast
- Keri Russell — Ambassador Kate Wyler
- Rufus Sewell — Hal Wyler
- David Gyasi — Foreign Secretary Austin Dennison
- Ali Ahn — Eidra Park
- Rory Kinnear — Prime Minister Nicol Trowbridge
- Ato Essandoh — Stuart Hayford
- Allison Janney — President Grace Penn
- Bradley Whitford — Todd Penn
Season schedule
Season 1
8 episodes
—
Season 2
6 episodes
—
Season 3
8 episodes
—
Season 4
8 episodes
October 15, 2026