Slow Horses Season 6 is finally here. Apple TV’s hit spy thriller returns on Wednesday, September 16, 2026, with a new six-episode story following Jackson Lamb and the Slough House team.
Gary Oldman is back as Jackson Lamb, alongside Jack Lowden, Kristin Scott Thomas, Saskia Reeves, Christopher Chung, and the rest of the returning cast. Olivia Cooke also returns as Sidonie “Sid” Baker.
If you’re wondering when Slow Horses Season 6 comes out, what time Episode 1 will be released, how the episodes will be scheduled, who is in the cast, and where to watch, here’s everything you need to know.
When Does Slow Horses Season 6 Come Out?
Slow Horses Season 6 premieres on Wednesday, September 16, 2026, on Apple TV.
Apple TV confirmed the Season 6 premiere date and described the new season as a six-episode return for the Emmy- and BAFTA-winning spy drama. You can find the latest official information, images, and announcements on the Slow Horses page from Apple TV Press.
The sixth season follows a weekly release schedule rather than dropping the entire season at once.
Episode 1 arrives on September 16, with a new episode following each Wednesday until the Season 6 finale on October 21.
What Time Does Slow Horses Season 6 Episode 1 Come Out?
Apple TV has confirmed that Slow Horses Season 6 Episode 1 premieres on September 16, 2026, but an official release time has not been announced by Apple TV Press.
Because of that, it’s better not to rely on unofficial reports claiming a specific release time.
Apple TV releases can also appear at different local times depending on the viewer’s location and the platform’s rollout.
For now, the confirmed information is:
Slow Horses Season 6 Episode 1 — September 16, 2026, on Apple TV
If Apple TV announces a specific release time, that information can be updated here.
Slow Horses Season 6 Episode Schedule
Season 6 has six episodes, with one new episode arriving each week.
Episode Release Date
Episode 1 September 16, 2026
Episode 2 September 23, 2026
Episode 3 September 30, 2026
Episode 4 October 7, 2026
Episode 5 October 14, 2026
Episode 6 October 21, 2026
The weekly schedule means viewers will have six weeks of new episodes, with the finale currently scheduled for October 21.
Unlike a binge release, Slow Horses Season 6 is being released one episode at a time.
What Is Slow Horses Season 6 About?
Season 6 once again follows the agents of Slough House as they find themselves caught up in another dangerous intelligence operation.
The new story puts Jackson Lamb and his team in a difficult situation while Diana Taverner becomes involved in a high-stakes conflict involving retaliation and revenge.
As always, the season brings together the show’s mix of espionage, political intrigue, dark humor, and complicated relationships between the agents of British intelligence.
Season 6 continues the story of characters from Mick Herron’s Slough House novels and brings another chapter to the long-running Apple TV series.
Slow Horses Season 6 Cast
Gary Oldman returns as Jackson Lamb, the head of Slough House.
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
- Joanna Scanlan
- Samuel West
- Ruth Bradley
- Tom Brooke
- Jonathan Pryce
- Hugo Weaving
- Olivia Cooke as Sidonie “Sid” Baker
Season 6 also features Lenny Rush as a new addition to the cast.
Apple TV’s official Season 6 materials include images featuring Olivia Cooke, Lenny Rush, Christopher Chung, Kristin Scott Thomas, and other members of the cast. You can find those on the official Apple TV Press image gallery.
Is Olivia Cooke Returning as Sid Baker?
Yes. Olivia Cooke returns as Sidonie “Sid” Baker in Slow Horses Season 6.
Sid has been an important character in the wider Slough House story, making Cooke’s return one of the notable developments surrounding the new season.
Her return gives Season 6 another connection to the show’s earlier storylines as the Slough House team faces its latest crisis.
Where Can You Watch Slow Horses Season 6?
Slow Horses Season 6 is streaming exclusively on Apple TV.
All previous seasons are also available on the service, making Apple TV the place to catch up with the series before starting Season 6.
If you’re new to the show, it is worth starting from Season 1 because the series follows an ongoing story involving Jackson Lamb, River Cartwright, Diana Taverner, and the wider Slough House team.
You can check the official Slow Horses information on Apple TV for the latest series updates.
Do You Need to Watch Season 5 Before Season 6?
It is recommended, especially if you want the full context for the returning characters and storylines.
Slow Horses is a continuing series, so events from previous seasons can affect the characters and relationships in the new episodes.
Season 5 is particularly useful to revisit before Season 6 because it provides the most immediate background to the current Slough House team.
If you don’t have enough time to rewatch the entire series, a Season 5 recap can be a quicker way to refresh your memory before Episode 1.
For viewers following the series from the beginning, however, watching all five previous seasons will provide the fullest picture of the characters and their history.
How Many Episodes Are in Slow Horses Season 6?
Slow Horses Season 6 has six episodes.
The first episode premieres on September 16, followed by one episode every Wednesday.
The current schedule runs as follows:
- Episode 1 — September 16
- Episode 2 — September 23
- Episode 3 — September 30
- Episode 4 — October 7
- Episode 5 — October 14
- Episode 6 — October 21
The Season 6 finale is therefore scheduled for October 21, 2026.
Is There a Slow Horses Season 7?
Yes. Slow Horses has already been renewed for Season 7, so the sixth season will not be the end of the series.
Apple TV has also announced Season 8, adapted from Mick Herron’s Clown Town. The announcement confirms that the series will continue beyond Season 6. You can read the official Apple TV announcement for Season 8.
That means Season 6 is part of a continuing story rather than the final chapter for Jackson Lamb and his team.
Slow Horses Season 6 Trailer
The official Slow Horses Season 6 trailer was released ahead of the premiere.
It teases another dangerous situation for the Slough House team, with Jackson Lamb and his colleagues caught up in a new conflict involving Diana Taverner.
The trailer gives viewers a first look at the returning characters and the threat facing the team without revealing the full story.
For the latest official trailers and video material, check Apple TV’s Slow Horses news and video coverage.
What Should You Know Before Watching Slow Horses Season 6?
If you’re starting Season 6 after a long break, there are a few things worth remembering.
Jackson Lamb remains the head of Slough House, the division where intelligence agents who have fallen out of favor are sent. River Cartwright remains one of the team’s most important members, while Diana Taverner continues to operate from the higher levels of British intelligence.
The series has also built up a large supporting cast over its previous seasons, meaning relationships and past events can matter when new crises emerge.
That is why Season 5 is the most useful season to revisit before starting the new episodes.
If you’re also catching up on other current TV releases, FilmRadar has covered shows such as The Rainmaker Season 2, including its release date, cast, and episode schedule.
Slow Horses Season 6 Release Schedule: Quick Answer
When does Slow Horses Season 6 start?
September 16, 2026.
What time does Episode 1 come out?
Apple TV has confirmed the premiere date, but an official release time has not been announced.
How many episodes are there?
Six episodes.
When is the finale?
October 21, 2026.
Is Slow Horses Season 6 weekly?
Yes. One episode is scheduled each Wednesday.
Where can you watch it?
Apple TV.
Is Olivia Cooke returning?
Yes. She returns as Sidonie “Sid” Baker.
Final Thoughts
Slow Horses Season 6 premieres on September 16, 2026, on Apple TV, bringing Jackson Lamb and the Slough House team back for another six-episode spy thriller.
The season follows a weekly release schedule, with new episodes arriving every Wednesday through the October 21 finale.
Gary Oldman returns as Jackson Lamb, alongside Jack Lowden, Kristin Scott Thomas, Saskia Reeves and the rest of the returning cast. Olivia Cooke is also back as Sid Baker.
For anyone planning to watch Episode 1 on release day, the premiere date is confirmed, while the exact release hour has not been officially announced. That makes September 16 the key date to remember rather than relying on an unconfirmed release time.