The Diplomat
No alliance lasts forever.
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.
Episodes
In Season Four, two marriages threaten to eat each other alive. One catastrophic moment shatters the fragile peace Kate Wyler brokered between the US and UK, as well as the crumbling marriage she's trying to save. While she fights to stem the bleeding, President Grace Penn and VP Hal Wyler's conspiracy to steal Russia's most powerful weapon hurtles the United States toward war. Kate and Todd, at best an uneasy pair, unite to stop the Grace-Hal alliance from upending the balance of power abroad and at home.
1Windsor
49 minOct 15, 2026★ 8.5
On an unplanned stopover at Windsor Castle, Kate grows wary of Hal and Grace's dynamic as she tries to contain the fallout from their covert actions.
2Redcoats
43 minOct 15, 2026★ 8.3
A shocking security breach sends the administration into crisis as Hal assumes new duties. Trowbridge launches a manhunt, and Kate looks to the future.
3The Typo
58 minOct 15, 2026★ 8.2
A budgetary snag threatens to torpedo negotiations, with costly implications for the US. Stuart and Eidra get personal as they weigh their next move.
4Pagliacci
53 minOct 15, 2026★ 8.3
After Hal drops a bombshell that throws the UK alliance into jeopardy, Kate faces mounting pressure to control the damage by any means necessary.
5Special Envoy
54 minOct 15, 2026★ 9.0
Kate contends with her complicity in a stunning political shake-up, while a disenchanted Todd explores his options across the pond.
6The Dead
54 minOct 15, 2026★ 9.4
When a dangerous adversary makes its move, Grace issues a hard-line threat to the prime minister, forcing Kate to reckon with her role as the messenger.
7Phony Negroni
53 minOct 15, 2026★ 8.9
Personal and political lives collide — and damaging secrets surface — when Kate and Hal join Grace and Todd in Italy ahead of the G7 summit.
8Warships
61 minOct 15, 2026★ 9.5
At a meeting of world leaders, a diplomatic breakdown edges the US closer to an international crisis — and compels Kate to make a seismic decision.
Where to watch The Diplomat
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Availability from JustWatch, via TMDB. Full listing for United States
Series cast
