Netflix has released the brand-new trailer for ‘The Diplomat’ Season 3, and we couldn’t be more ready! This show has already delivered two outstanding seasons of smart, twisty political drama, and the teaser makes it clear the third instalment is going to be every bit as sharp, chaotic, and addictive. Even better, it brings us a mini West Wing reunion, with Bradley Whitford (The West Wing, The Handmaid’s Tale) joining Allison Janney (The West Wing, Mom) for some White House-adjacent fireworks.
Season 3 wastes no time throwing Kate Wyler (played with steely brilliance by Keri Russell (The Americans)) into deeper waters. After the shocking finale of Season 2, which saw (SPOILERS) Vice President Grace Penn (Janney) implicated in a terrorist plot and suddenly elevated to the presidency following the death of President Rayburn, the world order has shifted overnight. Now Kate must navigate the nightmare scenario of actually getting the power she never wanted, while her husband Hal (Rufus Sewell, Old) continues his relentless campaign to land her the vice presidency. The trailer teases fraught alliances, unnerving new dynamics, and the kind of rapid-fire diplomatic dialogue that made us fall in love with this series from the start.
Whitford plays Todd Penn, the new First Gentleman, whose polite questions over cocktails conceal the same razor-edged political tension that fuels the entire show. Showrunner Debora Cahn calls him “the fantasy version of Todd” and admits the team still cannot believe they pulled off casting Whitford opposite Janney again. For fans of The West Wing, this is pure catnip.
To quickly remind you exactly where things left off in Season 2: Kate discovered the bombing of a British naval ship was not the work of foreign powers, but of forces inside the British government itself. The conspiracy led directly to Janney’s Grace Penn, who orchestrated the attack to keep Scotland from pursuing independence, and in turn to keep the US and UK nuclear submarine base at Creegan alive. When Hal bypassed diplomatic channels and rang the president directly with the explosive intel, the fallout was immediate and catastrophic. President Rayburn collapsed, leaving Penn as the new Commander in Chief, and Kate staring down the reality that her worst enemy now runs the free world.
Season 3 promises to “flip the chessboard,” as Cahn puts it. The trailer certainly delivers on that promise, showing Kate caught between loyalty, ambition, and survival while her bond with Foreign Secretary Austin Dennison (David Gyasi, Carnival Row) deepens, and her uneasy ties to both Hal and Todd complicate every move she makes.
The returning cast also includes Ali Ahn (Raising Dion) as CIA Station Chief Eidra Park, Ato Essandoh (Away) as Stuart Hayford, and Rory Kinnear (Penny Dreadful) as British Prime Minister Nicol Trowbridge. New addition Aidan Turner (Poldark) also appears as a guest star.
Production wrapped earlier this year in London and New York, with Russell herself hinting at the intensity of the season’s big ensemble scenes on Netflix’s Skip Intro podcast: “It’s such rapid-fire diplomatic speak that we make sure everyone’s on the same page and knows what we’re actually talking about.”
‘The Diplomat’ has already been renewed for a fourth season, so fans can relax knowing the political chaos is not stopping anytime soon.
‘The Diplomat’ Season 3 premieres Thursday, 16th October 2025 on Netflix.
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