As the US Ambassador works to rebuild ties with Great Britain, she finds herself attempting to avert war as relations between nations—and spouses—become more complicated.

After barely averting war with the United Kingdom, American Ambassador Kate Wyler fears the President’s latest covert moves involving Russia may endanger the Brits. It puts her at odds with her own husband, Vice-President Hal Wyler, who’s playing a dangerous game with nuclear assets. After the government is toppled, Kate must rebuild trust with the new Prime Minister, who rightly regards the US with suspicion. Meanwhile, an assassination attempt makes President Grace Penn even more hawkish, leaving her willing to blow up relationships with allies, her staff, and her husband in order to get her way.

Keri Russell, Rufus Sewell, and Allison Janney return in season 4 of “The Diplomat.” The Netflix series spins a further web of geopolitical intrigue and political maneuvering, while exploring the effects of simmering hostilities and required sacrifices within marriages.

OUR SPOILER-FREE REVIEWS OF SEASON 4 OF "THE DIPLOMAT" BEGIN IN THE FINAL 10 MINUTES OF THE EPISODE.

In Crime of the Week: Liberty from Biberty.