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The Diplomat
2023 4 seasons Drama · Thriller
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The Diplomat 4 of 4

Season 4

8 episodes 2026 6 h 57 min 1080p
The Diplomat — Season 4

About this season

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.

Season premiere
October 15, 2026
Episodes in the season
8
Whole season
6 h 57 min
October 15, 2026 Season fully aired October 15, 2026

Episodes

8 episodes · 6 h 57 min

  1. 15 Oct 2026 E01

    Windsor

    48 min

    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.
  2. 15 Oct 2026 E02

    Redcoats

    42 min

    A shocking security breach sends the administration into crisis as Hal assumes new duties. Trowbridge launches a manhunt, and Kate looks to the future.
  3. 15 Oct 2026 E03

    The Typo

    57 min

    A budgetary snag threatens to torpedo negotiations, with costly implications for the US. Stuart and Eidra get personal as they weigh their next move.
  4. 15 Oct 2026 E04

    Pagliacci

    52 min

    After Hal drops a bombshell that throws the UK alliance into jeopardy, Kate faces mounting pressure to control the damage by any means necessary.
  5. 15 Oct 2026 E05

    Special Envoy

    53 min

    Kate contends with her complicity in a stunning political shake-up, while a disenchanted Todd explores his options across the pond.
  6. 15 Oct 2026 E06

    The Dead

    53 min

    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.
  7. 15 Oct 2026 E07

    Phony Negroni

    52 min

    Personal and political lives collide — and damaging secrets surface — when Kate and Hal join Grace and Todd in Italy ahead of the G7 summit.
  8. 15 Oct 2026 E08

    Warships

    60 min

    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.