Slow Horses season 6 sets Apple TV's first sixth-season record
Apple TV’s Slow Horses season 6 arrives this month as the streamer’s first original drama to reach a sixth season — a record no other Apple TV show has matched yet. Starring Harry Potter alum Gary Oldman as Jackson Lamb, the critically unblemished spy thriller premieres on September 16, 2026, with six weekly episodes through October 21.
Key Takeaways
- Slow Horses season 6 is Apple TV’s first original to reach a sixth season, with Season 7 already ordered.
- The new run premieres September 16, 2026, then drops weekly through October 21.
- Slough House is pulled into Diana Taverner’s revenge cycle and forced onto the run.
- The season shifts toward serialized storytelling, bringing back Sid Baker, Louisa Guy, and Frank Harkness.
- It adapts two Mick Herron novels—Joe Country and Slough House—under head writer Gaby Chiappe.
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Why does Slow Horses season 6 set a new Apple TV record?
Since premiering in April 2022, Slow Horses has quietly become a gold-standard Apple TV original. Coverage of the milestone notes that no other original on the service has reached a sixth season yet. For All Mankind has a sixth season planned, but Apple has framed it as a finale and has not set a premiere date.
Critical goodwill backs the claim. None of the first five seasons earned a Rotten Tomatoes “Rotten” score, and Season 4’s perfect 100% Tomatometer mark made it the streamer’s highest-rated show. Season 5 also drew nine Emmy nominations, including Outstanding Drama Series and acting nods for Oldman and Jack Lowden.
What changes in the Slow Horses season 6 formula?
Earlier seasons delivered a self-contained case each year. Collider reports Season 6 leans into serialized storytelling, continuing threads from prior years instead of resetting the board.
Returning faces include Rosalind Eleazar’s Louisa Guy, Hugo Weaving’s Frank Harkness from Season 4, and—most strikingly—Olivia Cooke’s Sidonie “Sid” Baker, last seen after a Season 1 shooting that left her fate murky. Creator-showrunner Will Smith has exited; Gaby Chiappe takes over as head writer. Past and present Slough House agents are being targeted, raising the stakes beyond a one-and-done case.
When does Slow Horses season 6 premiere, and what is the story?
Season 6 launches Wednesday, September 16, 2026. The first episode drops at premiere, with new installments each Wednesday through October 21. Adam Randall returns to direct.
Plot-wise, MI5 Deputy Director-General Diana Taverner (Kristin Scott Thomas) pulls Slough House into a lethal cycle of retaliation. Rather than probing cases from the margins, the team must elude a system targeting them head-on. The season draws from Herron’s Joe Country and Slough House, with Season 7—already greenlit from Bad Actors—still without an air date.
Jack Lowden reprises River Cartwright alongside Saskia Reeves, Christopher Chung, Aimee-Ffion Edwards, and the wider ensemble. Seasons 1–5 remain streaming on Apple TV ahead of the September launch.
Is another Slow Horses season already locked in?
Yes. Apple TV+ has ordered a seventh season based on Bad Actors, Mick Herron’s eighth Slough House novel. No premiere window has been announced, but the renewal underscores why the Slow Horses season streak matters: the show keeps shipping while staying a critical favorite.