Slow Horses
Drinker. Thinker. Rebel. Spy.
Follow a dysfunctional team of MI5 agents—and their obnoxious boss, the notorious Jackson Lamb—as they navigate the espionage world's smoke and mirrors to defend England from sinister forces.
Cast
Gary Oldman
Jackson Lamb
Jack Lowden
River Cartwright
Kristin Scott Thomas
Diana Taverner
Saskia Reeves
Catherine Standish
Christopher Chung
Roddy Ho
Aimee-Ffion Edwards
Shirley Dander
Seasons
When a young man is kidnapped and threatened with beheading, the slow horses find themselves unexpectedly embroiled in a dangerous case that forces them to prove their worth.
E1Failure's Contagious
Apr 1, 2022
River Cartwright is ousted from MI5 and finds himself in a place worse than purgatory: Slough House, dumping ground for failed spies.
E2Work Drinks
Apr 1, 2022
River and Sid join forces. A misfired gun has dire consequences.
E3Bad Tradecraft
Apr 8, 2022
Slough House is the unlikely venue for a secret romance, but events take a dark turn when a dangerous encounter becomes deadly.
E4Visiting Hours
Apr 15, 2022
Taverner sends the Dogs to hunt down Lamb and the Slow Horses. River holds the secret to saving the gang.
E5Fiasco
Apr 22, 2022
The Slow Horses must disappear to avoid capture by MI5. Lamb and River head to The Park to outwit Taverner.
E6Follies
Apr 29, 2022
Taverner and the Slow Horses attempt different approaches to locate the kidnappers and Hassan. Ho makes a shocking discovery about Sid.
Long-buried Cold War secrets emerge which threaten to bring carnage to the streets of London. When a liaison with Russian villains takes a fatal turn, our hapless heroes must overcome their individual failings and raise their spy game in a race to prevent a catastrophic incident.
E1Last Stop
Dec 2, 2022
Jackson Lamb is on high alert after a former spy is found dead. Min and Louisa are tempted by an offer from outside Slough House.
E2From Upshott with Love
Dec 2, 2022
Lamb liaises with a Russian defector who may hold a clue to sleeper agents. River is on the trail of a ruthless assassin.
E3Drinking Games
Dec 9, 2022
River gets cozy in the Cotswolds while searching for a sleeper agent. Min discovers Russian drinking games are the most brutal of all.
E4Cicada
Dec 16, 2022
Louisa makes her move on Pashkin. Catherine makes moves of a different kind when she plays high-stakes chess with a sinister stranger.
E5Boardroom Politics
Dec 23, 2022
Lamb orders his Slow Horses to walk into traps. River believes something alarming is heading toward London.
E6Old Scores
Dec 30, 2022
Lamb and Katinsky go head-to-head. Ho finds himself trapped on a train with a Russian assassin.
A romantic liaison in Istanbul threatens to expose a buried MI5 secret in London. When Jackson Lamb and his team of misfits are dragged into the fight, they find themselves caught in a conspiracy that threatens the future not just of Slough House but of MI5 itself.
E1Strange Games
Nov 29, 2023
A romantic relationship in Istanbul ends badly. Lamb hits the panic button when one of his Slow Horses fails to show up for work.
E2Hard Lessons
Nov 29, 2023
River has to steal something out of the Park to save a life. Lamb realizes a stranger game is afoot.
E3Negotiating with Tigers
Dec 6, 2023
Marcus and Shirley face Lamb's wrath. River discovers revenge is a dish best served cold.
E4Uninvited Guests
Dec 13, 2023
Tearney makes a bold move. The Slow Horses assist the Tiger Team, unaware of their hidden agenda. Lamb and Ho take a road trip.
E5Cleaning Up
Dec 20, 2023
Taverner and Tearney face off for control of MI5. River and Louisa find themselves caught in the crossfire.
E6Footprints
Dec 27, 2023
The Slow Horses fight for their lives. Lamb shares some devastating truths with Catherine.
In season 4, a bombing detonates personal secrets, rocking Slough House's already unstable foundations.
E1Identity Theft
Sep 4, 2024
A London bombing puts Taverner under pressure. When River grows concerned for his grandfather, Louisa encourages him to go for a visit.
E2A Stranger Comes to Town
Sep 11, 2024
A naive agent makes a discovery about the Westacres bomber. Lamb suspects that David knows more than he's letting on.
E3Penny for Your Thoughts
Sep 18, 2024
River is trapped in France. Back at Slough House, the Dogs have come for Lamb.
E4Returns
Sep 25, 2024
Taverner is desperate to hide dangerous secrets. River seeks answers at his grandfather's house.
E5Grave Danger
Oct 2, 2024
Lamb questions David about France as River comes face to face with the enemy.
E6Hello Goodbye
Oct 9, 2024
Impossible decisions are faced and sacrifices are made.
In season five, everyone is suspicious when resident tech nerd Roddy Ho has a glamorous new girlfriend. When a series of increasingly bizarre events occur across the city, it falls to the Slow Horses to work out how everything is connected. After all, Lamb knows that in the world of espionage, the London Rules — cover your back — always apply.
E1Bad Dates
Sep 24, 2025
A mass shooting rocks London, intensifying a testy mayoral race. Shirley believes one of the Slow Horses was the target of an attempted hit.
E2Incommunicado
Oct 1, 2025
Lamb intercepts an assassin. Taverner receives a key piece of intel about the Abbotsfield shooting.
E3Tall Tales
Oct 8, 2025
An act of sabotage grinds London to a halt. Taverner interrogates Roddy. Coe is convinced a destabilization strategy is at play.
E4Missiles
Oct 15, 2025
Flyte sets out to find Roddy's girlfriend. The gang is dispatched to two different campaign events to prevent another attack.
E5Circus
Oct 22, 2025
Lamb debriefs River and Coe. Roddy is pulled in to help decipher a piece of code as the destabilization strategy nears its final stage.
E6Scars
Oct 29, 2025
It's up to the Slow Horses to stop Farouk's team from completing its mission in a final act of mass carnage.
In season six, the Slow Horses are on the run as Diana Taverner embroils them all in a fatally high-stakes game of retaliation and revenge.
E1Episode 1
Sep 16, 2026
E2Episode 2
Sep 23, 2026
E3Episode 3
Sep 30, 2026
E4Episode 4
Oct 7, 2026
E5Episode 5
Oct 14, 2026
E6Episode 6
Oct 21, 2026
Videos
Storyline
Follow a dysfunctional team of MI5 agents—and their obnoxious boss, the notorious Jackson Lamb—as they navigate the espionage world's smoke and mirrors to defend England from sinister forces.
