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.

River Cartwright is ousted from MI5 and finds himself in a place worse than purgatory: Slough House, dumping ground for failed spies.

Failure's Contagious

River and Sid join forces. A misfired gun has dire consequences.

Work Drinks

Slough House is the unlikely venue for a secret romance, but events take a dark turn when a dangerous encounter becomes deadly.

Bad Tradecraft

Taverner sends the Dogs to hunt down Lamb and the Slow Horses. River holds the secret to saving the gang.

Visiting Hours

The Slow Horses must disappear to avoid capture by MI5. Lamb and River head to The Park to outwit Taverner.

Fiasco

Taverner and the Slow Horses attempt different approaches to locate the kidnappers and Hassan. Ho makes a shocking discovery about Sid.

Follies

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.

Last Stop

Lamb liaises with a Russian defector who may hold a clue to sleeper agents. River is on the trail of a ruthless assassin.

From Upshott with Love

River gets cozy in the Cotswolds while searching for a sleeper agent. Min discovers Russian drinking games are the most brutal of all.

Drinking Games

Louisa makes her move on Pashkin. Catherine makes moves of a different kind when she plays high-stakes chess with a sinister stranger.

Cicada

Lamb orders his Slow Horses to walk into traps. River believes something alarming is heading toward London.

Boardroom Politics

Lamb and Katinsky go head-to-head. Ho finds himself trapped on a train with a Russian assassin.

Old Scores

A romantic relationship in Istanbul ends badly. Lamb hits the panic button when one of his Slow Horses fails to show up for work.

Strange Games

River has to steal something out of the Park to save a life. Lamb realizes a stranger game is afoot.

Hard Lessons

Marcus and Shirley face Lamb's wrath. River discovers revenge is a dish best served cold.

Negotiating with Tigers

Tearney makes a bold move. The Slow Horses assist the Tiger Team, unaware of their hidden agenda. Lamb and Ho take a road trip.

Uninvited Guests

Taverner and Tearney face off for control of MI5. River and Louisa find themselves caught in the crossfire.

Cleaning Up

The Slow Horses fight for their lives. Lamb shares some devastating truths with Catherine.

Footprints

A London bombing puts Taverner under pressure. When River grows concerned for his grandfather, Louisa encourages him to go for a visit.

Identity Theft

A naive agent makes a discovery about the Westacres bomber. Lamb suspects that David knows more than he's letting on.

A Stranger Comes to Town

River is trapped in France. Back at Slough House, the Dogs have come for Lamb.

Penny for Your Thoughts

Taverner is desperate to hide dangerous secrets. River seeks answers at his grandfather's house.

Returns

Lamb questions David about France as River comes face to face with the enemy.

Grave Danger

Impossible decisions are faced and sacrifices are made.

Hello Goodbye

A mass shooting rocks London, intensifying a testy mayoral race. Shirley believes one of the Slow Horses was the target of an attempted hit.

Bad Dates

Lamb intercepts an assassin. Taverner receives a key piece of intel about the Abbotsfield shooting.

Incommunicado

An act of sabotage grinds London to a halt. Taverner interrogates Roddy. Coe is convinced a destabilization strategy is at play.

Tall Tales

Flyte sets out to find Roddy's girlfriend. The gang is dispatched to two different campaign events to prevent another attack.

Missiles

Lamb debriefs River and Coe. Roddy is pulled in to help decipher a piece of code as the destabilization strategy nears its final stage.

Circus

It's up to the Slow Horses to stop Farouk's team from completing its mission in a final act of mass carnage.

Scars

River braces for his grandfather's funeral. Lamb looks into the death of an ex–Slow Horse.

Circle of Life

The reemergence of Frank Harkness and a suspicious string of murders put Lamb and team on high alert.

Daddy Issues

Ex–Slow Horses return to the fold as assassins close in. Taverner faces the fallout of her TV interview.

Resurrection

Lamb tries figuring out who Frank is working for. Sid, River, and Coe do everything to evade the hit squad.

Lost & Found

River goes after Sid. Lamb sets his sights on Cantor. Taverner carries on with a treacherous deal.

Sayonara

The safe house becomes unsafe as Lamb and Taverner finally join forces.

Slow Horses

Episode · Musim 1