From the moment the episode opens on the lingering shock of River Cartwright walking into his late grandfather’s house and finding someone he has spent years mourning, the episode locks in with confidence. What follows is not simply a reunion or a chase sequence, but a densely packed, darkly comic, and emotionally sharp episode as the season hits its stride. The title is more than apt; this is an episode about people and threats that refuse to stay buried, about professional lies that create living ghosts, and about the peculiar, dysfunctional family that is Slough House assembling itself under pressure.
Olivia Cooke’s return as Sid Baker is the emotional and narrative drive, and she slips back into the series with ease. The chemistry with Jack Lowden’s River is immediate with their scenes layered with the specific awkwardness of two people who once shared a high-stakes professional bond and now have three years of silence, and presumed death, to navigate. River’s mixture of relief, anger, and lingering affection is beautifully played; Sid’s mixture of defensiveness, dry wit, and quiet hurt lands just as cleanly. The pair carry long stretches of conversation that double as exposition without ever feeling like it. When the assassins arrive, the personal history is interrupted by pure spy craft urgency, and the episode never looks back.
The ensuing cat-and-mouse across the Kent countryside is textbook Slow Horses: tense without being breathless, inventive without resorting to stylish set pieces. River and Sid’s stop at the home of an elderly woman named Anne produces some of the episode comedy highlights. River’s encounter with a decades-old Fray Bentos pie, the woman’s cheerful assumption that Sid must have worked in the typing pool, and the pair’s half-hearted attempts at normal conversation while killers close in are the kind of moments that define the series. The show has always understood that the absurd and the lethal sit side by side in the intelligence world, and here the balance is perfected. Even the practical problem of how two people on the run stay one step ahead feels grounded in the characters’ limited resources and imperfect tradecraft rather than Bondian competence.
Meanwhile, the other Slow Horses are finally operating as a scattered but coherent team. Shirley Dander and Catherine Standish’s retrieval of Louisa Guy from her polished corporate exile is another comedic highpoint. Rosalind Eleazar slips back into the role as if she never left, and the banter between Louisa and Shirley is sharp, affectionate, and laced with the shared history of people who have already survived too much. Their timely arrival at Moira Tregorian’s house, just in time to interrupt a staged gas-leak assassination attempt, delivers another literal resurrection and a surprising jolt of genuine relief.
Gary Oldman, of course, continues to make Jackson Lamb one of the great television creations of the recent years. Paired with Christopher Chung’s Roddy Ho and the excellent Lenny Rush as Reece Nesmith,the sharp, unimpressed son of a recently murdered agent, Lamb’s scenes full of on brand Slow Horses comedy. The generational and temperamental mismatch between the veteran spymaster and the teenage witness produces friction that is both hilarious and oddly touching. Oldman finds new variations on Lamb’s signature disgust, strategic laziness, and intermittent flashes of professional brilliance. When Lamb eventually confronts the political fallout swirling around Diana Taverner, the scene have a particular tension that only these two performers generate. Kristin Scott Thomas’s Taverner is under siege after her disastrous public interview, and her decision to banish Emma Flyte to Slough House feels like both petulance and calculation.
The episode picks up the pace of this season’s adventure without rushing answers. The revelation that Sid’s identity appears to have been used in connection with a killing in Kazan adds a personal dimension to the campaign against former Slough House personnel. The Russian connection of the assassins, the missing physical files, Lamb’s growing suspicion of a leak inside the Park, and Taverner’s political vulnerability all begin to circle one another without a neat answer floating to the surface. The pleasure of Slow Horses has never been in pure puzzle-solving so much as in watching damaged, foul-mouthed, surprisingly competent people navigate the consequences of other people’s secrets.
Cutting between the countryside pursuit, the rescue of Moira, Lamb’s investigation, and the political maneuvering at the Park keeps the episode moving at a clip but it never loses sight of the characters. Every pairing feels deliberate and rewarding: River and Sid’s unfinished business, Louisa and Shirley’s prickly camaraderie, Lamb and Reece’s generational standoff, Catherine’s quiet competence under pressure. They insult one another, protect one another, and occasionally surprise one another, and in doing so they make the high-stakes intrigue feel human-scale.
They episode changes the shape of the season. Players who were missing have returned. Threats that felt abstract have become personal and mobile. Alliances that were dormant have been reactivated under duress. And yet the show retains its essential tone; caustic, weary, unexpectedly loyal, and frequently very funny.
The performances are uniformly excellent and the balance of suspense, humor, and quiet character work is borderline perfect. Slow Horses continues to stand out by being less interested in glamorous competence than in the messy, resentful, occasionally brilliant reality of people who know they are expendable and keep showing up anyway.
Resurrection is sharp, funny, tense, and deeply invested in its people. It sets up the next episode while leaving you completely satisfied by the one just finished. That is no small achievement, and this episode pulls it off with the unshowy excellence that has become the series’ signature.
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Where to watch Slow Horses – Season 6, Episode 3: Resurrection: