Apple TV is bringing Slow Horses back this fall, with Gary Oldman returning as the sharp-minded and bad-tempered MI5 veteran Jackson Lamb. Season 6 premieres globally on Wednesday, September 16, 2026, and will continue the British spy drama’s mix of tense missions, dark humor, office politics, and dangerous mistakes.
- Season: 6
- Number of episodes: 6
- Genre: Spy thriller, drama and dark comedy
- Premiere date: September 16, 2026
- Finale date: October 21, 2026
- Release schedule: One new episode every Wednesday
- Streaming platform: Apple TV
- Age rating: TV-MA
What is Slow Horses Season 6 about?
Season 6 places the Slough House agents in greater danger as Diana Taverner pulls them into a deadly game involving revenge and retaliation. The team will find itself on the run, forcing Jackson Lamb and his troubled agents to work together while powerful figures inside British intelligence close in on them.
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The story adapts Joe Country and Slough House, the sixth and seventh novels in Mick Herron’s book series. The season will continue following the rejected MI5 agents who work from Slough House after serious professional mistakes damaged their careers, although their unusual methods often place them at the centre of major national security cases.
Gary Oldman returns as Jackson Lamb alongside Kristin Scott Thomas as Diana Taverner and Jack Lowden as River Cartwright. Saskia Reeves, Christopher Chung, Aimee-Ffion Edwards, Rosalind Eleazar, Jonathan Pryce, Hugo Weaving and several other familiar cast members will also return. Lenny Rush joins the series as a new cast member.
Slow Horses Season 6 FAQs
When does Slow Horses Season 6 start?
Slow Horses Season 6 premieres on Apple TV on Wednesday, September 16, 2026. The season begins with one episode rather than a multi-episode premiere.
When will the Slow Horses Season 6 finale air?
The sixth and final episode will arrive on Wednesday, October 21, 2026. Apple TV will release one episode each week between the premiere and finale.
How many episodes are in Slow Horses Season 6?
Season 6 contains six episodes, matching the compact structure used throughout the previous seasons.
Is Gary Oldman returning for Slow Horses Season 6?
Yes. Gary Oldman returns as Jackson Lamb, the brilliant but abrasive leader of the Slough House team. Kristin Scott Thomas and Jack Lowden will also return in major roles.
Do I need to watch the earlier seasons first?
Watching the first five seasons will help because Season 6 continues existing character relationships, rivalries and intelligence-service conflicts. All five previous seasons are available to stream on Apple TV.
Has Slow Horses been renewed for Season 7?
Yes, Slow Horses will continue beyond Season 6, so the September return will not mark the end of Jackson Lamb and the Slough House agents.
Apple TV costs $12.99 per month in the United States after a seven-day free trial for new subscribers. With all five existing seasons already available, viewers have enough time to catch up before Slow Horses Season 6 begins on September 16. What do you plan to watch on Apple TV this fall? Let us know in the comments.
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