Slow Horses, the critically acclaimed British spy thriller on Apple TV+, has captivated audiences with its sharp wit, gripping espionage, and stellar performances. With Season 4 wrapping up in October 2024, fans are eagerly awaiting Slow Horses Season 5. Based on Mick Herron’s Slough House novels, the series follows a dysfunctional team of MI5 agents led by the brilliant but slovenly Jackson Lamb (Gary Oldman). Here’s everything we know so far about Slow Horses Season 5, including release date speculation, cast updates, and plot details.
Slow Horses Season 5 Release Date Speculation
Apple TV+ has confirmed that Slow Horses Season 5 will premiere in summer 2025, with estimates pointing to a likely release in July or August 2025. The show has maintained an impressive production pace, releasing new seasons annually or even sooner. Seasons 1 and 2 aired in 2022, Season 3 in December 2023, and Season 4 in September 2024. Filming for Season 5 wrapped in August 2024, and the series is now in post-production, suggesting a quick turnaround.
Slow Horses Season 5 Expected Cast
The core ensemble of Slow Horses is expected to return for Season 5, bringing back the misfit agents of Slough House. Confirmed cast members include:
-
Gary Oldman as Jackson Lamb, the crude yet cunning head of Slough House.
-
Jack Lowden as River Cartwright, the ambitious agent navigating his MI5 legacy.
-
Kristin Scott Thomas as Diana Taverner, MI5’s calculating Deputy Director.
-
Rosalind Eleazar as Louisa Guy, dealing with past traumas.
-
Christopher Chung as Roddy Ho, the overconfident tech nerd with a bigger role this season.
-
Saskia Reeves as Catherine Standish, Lamb’s recovering alcoholic secretary.
-
Aimee-Ffion Edwards as Shirley Dander, the volatile agent with anger issues.
-
Ruth Bradley as Emma Flyte, the new Head of the Dogs introduced in Season 4.
-
James Callis as Claude Whelan, Taverner’s insecure MI5 boss.
-
Tom Brooke as J.K. Coe, the mysterious new agent from Season 4.
Slow Horses Season 5 Potential Plot
Slow Horses Season 5 will adapt London Rules, the fifth novel in Mick Herron’s Slough House series, continuing the show’s pattern of adapting one book per season. The official synopsis from Apple TV+ teases: “Everyone is suspicious when resident tech nerd Roddy Ho has a glamorous new girlfriend, but 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, Jackson Lamb knows that in the world of espionage, ‘London Rules’ should always apply.”
How to Watch Slow Horses Season 5
Slow Horses Season 5 will stream exclusively on Apple TV+, with a subscription required. New users can take advantage of a seven-day free trial.
