Quick answer · Season 4
The Diplomat season 4 ran from October 15, 2026 to October 15, 2026 on Netflix (8 episodes).
Will there be a season 5 of The Diplomat, and who is in the season 4 cast?
Netflix has not announced a season 5 yet (as of October 22, 2026), and has not cancelled the show either. Season 4 came out on October 15, 2026 with 8 episodes. Keri Russell (Kate Wyler) and Rufus Sewell (Hal) return with David Gyasi, Ali Ahn, Rory Kinnear, Ato Essandoh and Aidan Turner; Allison Janney and Bradley Whitford are now series regulars, and Jodie Whittaker joins as the new British prime minister.
Source: Netflix Tudum, What's on Netflix (season 5 status); checked October 22, 2026.
- U.S. premiere
- October 15, 2026
- Where
- Netflix
- Time
- All at once
- Episodes
- 8
Watch the The Diplomat season 4 trailer
Official video from the network's or streamer's YouTube channel, played through YouTube's embedded player.
Where to watch The Diplomat season 4 in the U.S.
Season 4 episode schedule
| Ep. | Title | U.S. date | Time | Status |
|---|---|---|---|---|
| 1 | Windsor | [1][2][3] | All episodes same day | Announced |
| 2 | Redcoats | [1][2][3] | All episodes same day | Announced |
| 3 | The Typo | [1][2][3] | All episodes same day | Announced |
| 4 | Pagliacci | [1][2][3] | All episodes same day | Announced |
| 5 | Special Envoy | [1][2][3] | All episodes same day | Announced |
| 6 | The Dead | [1][2][3] | All episodes same day | Announced |
| 7 | Phony Negroni | [1][2][3] | All episodes same day | Announced |
| 8 | Warships | [1][2][3] | All episodes same day | Announced |
Dates are U.S. dates. Broadcast times are the network's national slot; your local station may differ.
About The Diplomat
Keri Russell plays Kate Wyler, a career diplomat turned U.S. ambassador to the United Kingdom whose crises keep reaching the top of both governments. Season 4 arrives on Netflix on October 15, 2026, with all eight episodes at once. It picks up after the reveal that President Penn and Kate's husband, Vice President Hal Wyler, secretly stole a Russian nuclear weapon.
Season 4: All eight hour-long episodes drop on Netflix on Thursday, October 15, 2026. A disaster wrecks the U.S.-U.K. relationship and Kate's marriage, and she ends up working with Todd Penn against the conspiracy.
- Originally from: Netflix (first aired April 20, 2023)
- Official site: netflix.com
- Cast: Keri Russell (Kate Wyler), Rufus Sewell (Hal Wyler), Allison Janney (President Grace Penn), Bradley Whitford (Todd Penn), Ato Essandoh (Stuart Heyford), Ali Ahn (Eidra Park), Rory Kinnear (Prime Minister Nicol Trowbridge), Nana Mensah (Billie Appiah)
All seasons
Season 4
Season completeAll eight hour-long episodes drop on Netflix on Thursday, October 15, 2026. A disaster wrecks the U.S.-U.K. relationship and Kate's marriage, and she ends up working with Todd Penn against the conspiracy.
Season 3
StreamingSeason 3 aired from 2025-10-16.
Common questions
When does The Diplomat season 4 come out?
Thursday, October 15, 2026, on Netflix.
Are all episodes of The Diplomat season 4 released at once?
Yes. All eight episodes are released together on October 15.
Is The Diplomat season 4 the final season?
Netflix hasn't said it is, and no end date has been announced.
Will there be a season 5 of The Diplomat?
Not announced yet. As of October 19, 2026, Netflix has not renewed The Diplomat for season 5, and it has not been cancelled either. Season 4 came out on October 15, 2026; Netflix usually decides after seeing viewing numbers. We will add the date here once Netflix confirms it.
When was the first episode of The Diplomat season 4?
Season 4 episode 1 premiered on Thursday, October 15, 2026 on Netflix.
How many episodes are in The Diplomat season 4?
Season 4 has 8 episodes; the finale aired on Thursday, October 15, 2026.
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Sources
We check each date against the sources below. If they disagree, we say so rather than picking one.
Update history
- Episode listings updated from TVmaze: S4E1 "Windsor", S4E2 "Redcoats", S4E3 "The Typo", S4E4 "Pagliacci", S4E5 "Special Envoy", S4E6 "The Dead", S4E7 "Phony Negroni", S4E8 "Warships".
- Upgraded to editor reviewed: October 15 release confirmed by Netflix Tudum; 8-episode binge drop and cast checked.
- Schedule imported from TVmaze listings.
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