A Russian submarine runs aground off the British coast, and there is an apocalypse weapon inside it. Somebody says so out loud in the first ten seconds of the season four trailer for “The Diplomat,” and then adds the part that actually matters, which is that the Americans took it. “You stole it,” the voice says, and nobody in the cut, British or American, denies it. That is the shape of the new season in one exchange, because this show has never really been about whether a crisis happens. It is about who decides, afterwards, what gets said.
Netflix dropped the trailer this week and dated the season for 15 October, when all eight episodes arrive at once, and the series is still being run by its creator Debora Cahn. Warning beyond this point there are spoilers for the first three seasons of “The Diplomat” and for what the season four trailer reveals, including who is now in the Oval Office, what the Americans did on an ally’s soil, and the question Kate Wyler finally asks about herself.
It is about who decides, afterwards, what gets said.”
The best line in the trailer is an accusation, and it is aimed squarely at the people we have been rooting for. “You made a covert military incursion into an ally’s territory,” somebody tells Kate Wyler (Keri Russell) and the room around her. “It’s over the line.” The answer comes back without a flicker of embarrassment, and it is the most revealing thing in the whole two and a half minutes. “The line moves. You don’t like that we kept you out of it.”
That is the American embassy talking to the British government, which is the engine this series has run on since 2023, and the trailer keeps returning to how corrosive it has become. Somebody warns, flatly, that a cover-up is not a solution. Somebody else, surveying the mess with what sounds like genuine admiration, says the phrase the marketing department must have wept over: “We perfected the art of weaponized incompetence.”
Grace Penn is president now, and the trailer treats that, correctly, as a changed weather system rather than a plot point. Season three put her in the chair, and season four is the first to run with her already there, which changes what the embassy is for. Allison Janney’s character spent two episodes as vice president and has spent twelve as commander in chief, which is a remarkable amount of screen time for a character introduced as somebody else’s problem. “Grace is different,” one voice says. Another supplies the doctrine in the next breath: “Russia responds to strength, not appeasement.” That is not a description of Grace Penn’s politics so much as a warning about them.
Prime Minister Nicol Trowbridge (Rory Kinnear) is, predictably, furious about all of it, and the trailer says plainly, in somebody else’s voice, that he could launch the country into an armed conflict over it. That is a sentence about an ally, spoken by the people who lied to him, and the show lets it sit there without comment. Kinnear has been quietly the funniest and most dangerous thing in this show for three seasons, playing a man whose worst decisions always arrive dressed as principle, and a season that hands him a stolen weapon and a lie to be angry about is a season built to his strengths.
Underneath the geopolitics the marriage is still there, and it is in worse shape than usual. Hal Wyler (Rufus Sewell) opens the trailer asking for a moment alone with his wife in front of a room of people, which is exactly the performance this character has always mistaken for intimacy. Later somebody tells Kate that she cannot live like this, wondering all the time whether her partner is about to run, and offers a detail that lands harder than any of the weapon talk. “I can feel your heart rate on my chest when we’re in bed.” The reply is four words long. “Then sleep someplace else.”
There is a whole exchange later that reads like the series arguing with itself. “I like you.” “You don’t know me.” “I love you.” “I can fix that.” Then, somewhere near the end, the two lines the season is built on: “I wanna come home.” “Where’s home?”
The real story, though, is what has happened to Kate. Three seasons ago she was the person in the room insisting on the rules, and the trailer now has somebody telling her that her tolerance for risk to human life seems higher than it used to be. She does not argue, and she does not deflect, which for this character is new. What she does instead is worse, and it is the moment the trailer has been building toward the whole time. “Maybe these aren’t small steps over the line,” she says. “What if this is a culture of consistent lawlessness and I’m part of it?”
That is a show turning its protagonist into the thing she was hired to correct, and saying so in its own marketing. It is a genuinely brave place to start a fourth season, because the easy version of this story keeps Kate clean and lets the institution rot around her. Cahn has chosen the harder one, where the competent person stays in the job long enough to become load-bearing for the corruption.
Everything else in the cut supports it, including the people around her. The bench is deep here, and it is the reason this show works at all. David Gyasi plays Foreign Secretary Austin Dennison, the man best placed to be delivering that line about an incursion over the line, and Ato Essandoh’s Stuart Hayford, Ali Ahn’s intelligence chief Eidra Park and Nana Mensah’s Billie Appiah have all spent three seasons being the people who find out what the Wylers did after the Wylers have already done it. There is a line about rowing in the same direction that gets immediately mocked as sounding like a dodgy car dealer. There is somebody asking who thinks there is something wrong with them and being told, unconvincingly, that nobody does. There is a flat, tired admission near the end that if they relayed every message word for word they would all be dead already, which is either a defense of diplomacy or a confession, depending on how charitable you feel.
“The Diplomat” has been a critical favorite for three seasons, and it has never quite had the audience that suggests, possibly because a series about the drafting of statements sounds like homework. The trailer is well aware of that problem and solves it the usual way, by leading with a submarine and an apocalypse weapon. The actual pitch, though, is buried at the ninety-second mark in a question Kate asks about herself, and that question is far more frightening than the warhead. Netflix is putting all eight episodes out on one day, which is the pattern this show has always used, and it suits a series whose plots turn on information travelling faster than anyone can contain it. The trailer argues the same case in its own edit, cutting between a stolen warhead, a furious prime minister and a couple arguing in bed as though all three were the same emergency.
What Do You Think? Is Kate Wyler right that she has become part of the problem, or is that the show letting her off with a confession? Does making Grace Penn president give this series a stronger engine than the ambassador job ever did? And after three seasons, should the Wyler marriage still be taking up this much of the runtime?
See you on the next binge!
