Slow Horses

MI5's most unruly spies are back and under attack.
Slow Horses (2022 — present)
Seasons: 6, episodes: 36
Average rating: 8.2/10 189 960
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Premiere
Status
Returning
Scenario
Composer
Producer
Jane Robertson
Actors
Photo Gary Oldman
Gary Oldman
Jackson Lamb
Photo Jack Lowden
Jack Lowden
River Cartwright
Photo Kristin Scott Thomas
Kristin Scott Thomas
Diana Taverner
Photo Hugo Weaving
Hugo Weaving
Frank Harkness
Photo Jonathan Pryce
Jonathan Pryce
David Cartwright
Photo Saskia Reeves
Saskia Reeves
Catherine Standish
Photo Christopher Chung
Christopher Chung
Roddy Ho
Photo Rosalind Eleazar
Rosalind Eleazar
Louisa Guy
All actors and roles (10)

Short description

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.

Seasons

SeasonEpisodesRelease dateRating
Season 1
Season 1
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.
6 2022-04-01 7.8
Season 2
Season 2
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.
6 2022-12-02 8.1
Season 3
Season 3
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.
6 2023-11-29 8.2
Season 4
Season 4
In season 4, a bombing detonates personal secrets, rocking Slough House's already unstable foundations.
6 2024-09-04 8.3
Season 5
Season 5
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, th…
6 2025-09-24 8.2
Season 6
Season 6
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.
6 2026-09-16 8.3

What's left behind the scenes

  • In the original books, the character named Peter Judd (played by Samuel West) is clearly based on former British Prime Minister Boris Johnson. In the series, the resemblance between them is not as apparent.
  • Animals are frequently mentioned in the series. Agents who have messed up and been gathered at Slough House are called 'slow horses'; representatives of internal investigations are 'dogs'; surveillance officers are 'stoats'; those who search for vulnerabilities in security systems are 'tigers'; and analysts are 'weasels'.
  • The lines spoken by David Cartwright, played by Jonathan Pryce, at the end of the first season's finale are references to John le Carré's series of novels about British intelligence agent George Smiley, specifically the 1963 book 'The Spy Who Came in from the Cold'. Gary Oldman, who plays Jackson Lamb in the series, played the role of Smiley in the thriller 'Tinker Tailor Soldier Spy' (Tomas Alfredson, 2011).

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What stayed with you from this series?

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