When does ‘Slow Horses’ Season 6 come out? Release date, time, episode schedule and more
The wait for 'Slow Horses' Season 6 is almost over, and Slough House is heading straight back into trouble. The new season premieres in the United States on Apple TV on Wednesday, September 16, 2026, bringing Gary Oldman’s Jackson Lamb and his team of disgraced MI5 agents back. Season 6 will have six episodes in total and Apple will release an episode every Wednesday, which means the season will continue through October before wrapping up with its finale on October 21, 2026.
The new season adapts Joe Country and Slough House, the sixth and seventh novels in Mick Herron’s Slough House book series. Apple’s official logline says, “Season 6 sees the 'Slow Horses' on the run as Diana Taverner embroils them all in a fatally high-stakes game of retaliation and revenge.”
That setup suggests Season 6 will push the team out of their usual messy office politics and into a more dangerous fight for survival. The story also brings back one of the show’s most unexpected faces: Olivia Cooke as Sidonie ‘Sid’ Baker. Sid was presumed dead after being shot in Season 1, but the Season 6 trailer confirmed that she is very much part of the new chapter.
Here is the confirmed U.S. release schedule for 'Slow Horses' Season 6:
Episode 1: Wednesday, September 16, 2026
Episode 2: Wednesday, September 23, 2026
Episode 3: Wednesday, September 30, 2026
Episode 4: Wednesday, October 7, 2026
Episode 5: Wednesday, October 14, 2026
Episode 6: Wednesday, October 21, 2026
The returning cast includes Gary Oldman as Jackson Lamb, Jack Lowden as River Cartwright, Kristin Scott Thomas as Diana Taverner, Saskia Reeves as Catherine Standish, Christopher Chung as Roddy Ho, Aimee-Ffion Edwards as Shirley Dander, Rosalind Eleazar as Louisa Guy, Jonathan Pryce as David Cartwright and Hugo Weaving as Frank Harkness. Lenny Rush also joins the ensemble in Season 6.
Fans also do not have to worry about this being the final mission just yet. Apple has already renewed 'Slow Horses' for Season 7, which will be based on 'Bad Actors,' the eighth novel in Herron’s series.
