“The third season turns the board upside down”, said Debora Cahn, creator, showrunner, and executive producer of The Diplomat . She added: “In the third season, Kate faces the particular nightmare of getting what she wants”. The finale of the second season left fans breathless, with an unexpected and dramatic twist: with several unresolved elements, the curiosity to discover what will happen in the new chapter of the political thriller is sky-high.
Season 3 is set between London and New York, the epicenters of geopolitical tensions, and, as we’ll see, lays the groundwork for new and thrilling adventures. The trailer is at the bottom of the article—and keep reading until the end for a big surprise!
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The great success of the previous seasons
The second season of The Diplomat replicated the success of the first, with a storyline that kept suspense high and introduced new political intrigues. The enthusiastic reviews and viewing numbers demonstrate how engaged the audience is with this Netflix series, which skillfully blends drama and international tension. Thanks to positive fan feedback, The Diplomat has established itself as one of the platform’s most popular political thrillers. On the review aggregator site Rotten Tomatoes, based on user reviews, the series boasts an excellent 89% approval rating. Also, visit Netflix’s official Instagram page for The Diplomat.
The Diplomat 3: a preview of the new season
In the first season, viewers followed U.S. Ambassador Kate Wyler through a delicate balancing act of diplomacy, culminating in an attack on the British aircraft carrier HMS Courageous, apparently orchestrated by hidden powers. The second season picked up exactly from that point, raising the stakes and revealing new alliances and betrayals that kept fans on edge until the very last episode. The second season closed with a twist (but we won’t spoil it).
This new political reality introduces an even more complex dynamic, in which Kate finds herself involved in an increasingly dangerous power game. The third season, therefore, promises to explore the consequences of this shift and reveal further facets of the relationship between Kate and her husband Hal. Fans can expect deeper intrigues, with new developments in the international conflict and political relationships among the characters.
Cast and new additions
The show was created by Debora Cahn, who specializes in this genre: she has previously written successful political thrillers such as Homeland and The West Wing. Coming straight from The West Wing is Bradley Whitford (also seen in The Handmaid’s Tale), who joins the cast as Todd Penn, husband of President Grace Penn, reuniting with his former West Wing colleague Allison Janney. The confirmed cast for the third season includes:
- Rory Kinnear as British Prime Minister Nicol Trowbridge
- Keri Russell as diplomat Kate Wyler
- Rufus Sewell as diplomat Hal Wyler
- David Gyasi as British Foreign Secretary Austin Dennison
- Ali Ahn as CIA station chief Eidra Park
- Ato Essandoh as Deputy Chief of Mission Stuart Hayford
- Allison Janney as President Grace Penn
Release date on Netflix
The third season of the series is available on Netflix starting October 16, 2025 ►WATCH ON NETFLIX
Here’s the big reveal!
We promised you a surprise—and here it is: Netflix has already renewed the show for Season 4! This comes even before the reception of Season 3, a clear sign that the political thriller has hit the mark.
