• Great news: The Diplomat is coming back for season 4.
  • And even better news for fans of The West Wing, your favorite crossover will continue!
  • Read on for potential season 4 plot details, including how things might get more complicated for Kate.

The past three seasons of The Diplomat have been nothing short of jaw-dropping. Each finale has been more shocking than the previous, and Kate Wyler (Keri Russell) has yet again found herself in a complicated position. Ensuring the safety of her marriage, her career, the fate of the country, and her own personal values has become a difficult balancing act. But the thrill of working in international relations and cutthroat politics hasn't worn off for her just yet.

There are still a lot of loose ends she wants to tie up, which is why her diplomatic mission has been extended once again. Here's everything we know about The Diplomat season 4.

Is The Diplomat coming back for season 4?

It's official: we're not done with this political drama just yet. Netflix has confirmed that The Diplomat will be returning for a fourth season. They've also announced that they're already beginning production on the show this fall.

This all makes sense, given the huge major cliffhanger season 3 ends on. Fans of the show will definitely want to know what's in store for the Wylers, the White House, and Downing Street as more geopolitical shenanigans take place—especially with power-hungry Grace Penny as the seated President.

What is The Diplomat season 4 going to be about?

Naturally, the fourth season is going to pick up where season 3 left off. [Some light spoilers head for the season 3 finale. Skip down to "who's coming back" if you want to avoid.] Kate, once again, comes to the knowledge of the nefarious acts of the administration she works for. And this time, her husband is involved as the current Vice President of the United States. Thanks to Hal's help, President Penny has—once again—covertly betrayed the U.K. in a very serious way by retrieving a deadly nuclear weapon from their waters.

The consequences of these decisions will definitely unfold in season 4. And series creator Debora Cahn said in an interview that fans “should be worried. There’s plenty to worry about.” She added, “It can be pretty chilling when you see who takes power and get the sense that they may be horrifically misusing it.”

the diplomat. (l to r) allison janney as grace penn, bradley whitford as todd penn in episode 308 of the diplomat. cr. clifton prescod/netflix © 2025
Netflix

Who's coming back from the cast?

It's certainly safe to assume that the show's main ensemble will make a return. Keri Russell will be playing Kate Wyler, Rufus Sewell as her husband (and now-VP) Hal Wyler, and the rest of the diplomatic mission's staff is expected to return as well. What is new is that Netflix has confirmed that The West Wing alums Allison Janney and Bradley Whitford will be returning as series regulars, playing the U.S. presidential couple, Grace and Todd Penn.

When will The Diplomat season 4 come out?

While Netflix has confirmed that production is beginning this fall, they have yet to announce an official release date. But going off of previous season releases, sometime in 2026 seems like a safe bet.

While waiting in the meantime, fans of the show can rewatch all three seasons of The Diplomat on Netflix.