When does Slow Horses season 6 come out? The sixth season premieres today, September 16, 2026, on Apple TV, with new episodes arriving weekly through October 21. Apple TV officially confirmed the September 16 premiere earlier this year, ending uncertainty surrounding the return of Gary Oldman’s Jackson Lamb and the Slough House team.
The new season contains six episodes. Apple TV has confirmed that the first episode arrives on September 16, followed by one episode each Wednesday. The season finale is scheduled for October 21, 2026.
For viewers in the United States, the premiere is available through Apple TV. The series continues its established weekly release format instead of dropping all six episodes at once.
The return is particularly significant because the sixth season adapts material from two novels in Mick Herron’s Slough House series: Joe Country and Slough House. The television adaptation once again centers on Jackson Lamb and the troubled intelligence officers assigned to Slough House.
Slow Horses Season 6 Release Date
The official release date is September 16, 2026.
Apple TV announced the date in June and later promoted the season with its official trailer. The platform’s current press materials continue to list September 16 as the Season 6 release date.
The premiere falls on a Wednesday, matching the weekly release pattern Apple TV has established for the series.
The season consists of six episodes. Rather than releasing the complete season on September 16, Apple TV is releasing one episode per week.
That gives U.S. viewers a clear schedule:
| 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 |
Apple TV has officially confirmed the six-episode schedule and October 21 finale date.
Is Slow Horses Season 6 Out Today?
Yes. As of September 16, 2026, Season 6 begins its official release on Apple TV.
Apple TV’s official Season 6 page lists September 16 as the season’s release date. The platform also released an official trailer in August that confirmed the same premiere date.
The first episode marks the beginning of the latest story involving Jackson Lamb and the Slough House agents.
Viewers who want to follow the season from the premiere should look for Episode 1 on Apple TV today. The remaining episodes will arrive weekly rather than becoming available together.
The series’ weekly rollout means fans will have six consecutive release dates to follow before the story reaches its conclusion on October 21.
What Time Does Slow Horses Season 6 Premiere in the U.S.?
Apple TV confirms the September 16 global premiere date, while U.S. viewers generally receive new Apple TV episodes according to the platform’s scheduled release window. The first episode is therefore available as part of the September 16 launch.
The exact time can vary by release system and location, so viewers should check Apple TV directly if the episode does not appear immediately at midnight in their local time.
For U.S. audiences, the important confirmed information is the release date rather than an unconfirmed assumption about a specific local release hour.
The season will remain on a weekly schedule after the premiere.
How Many Episodes Are in Season 6?
Season 6 has six episodes.
Apple TV confirmed the six-episode order when it announced the season’s release plans. Episode 1 premieres September 16, and the sixth and final episode arrives October 21.
The schedule gives the season a five-week span between its opening episode and finale.
That means viewers can expect the story to unfold gradually rather than receiving the entire season in a single day.
The episode pattern is straightforward:
- September 16 — Episode 1
- September 23 — Episode 2
- September 30 — Episode 3
- October 7 — Episode 4
- October 14 — Episode 5
- October 21 — Episode 6 and season finale
This schedule has been officially announced by Apple TV.
What Is Slow Horses Season 6 About?
Season 6 follows the Slough House agents as they become caught in another dangerous intelligence operation.
Apple TV describes the new season as a story in which the Slow Horses are on the run while Diana Taverner draws them into a high-stakes situation involving retaliation and revenge.
The sixth season draws from Joe Country and Slough House, the sixth and seventh books in Mick Herron’s Slough House series.
That gives the season a direct connection to the literary material while allowing the television series to continue its established characters and storyline.
Jackson Lamb remains at the center of the series. Gary Oldman returns as the Slough House leader, while the wider ensemble also returns for the new season.
The official trailer emphasizes the danger surrounding the team and makes clear that the new episodes will continue the show’s combination of espionage, dark humor and high-stakes missions.
Who Returns for Season 6?
Gary Oldman returns as Jackson Lamb, the head of Slough House and one of the central characters in the series.
The Season 6 cast also includes several familiar faces from earlier seasons.
Apple TV’s official announcement lists:
- Gary Oldman as Jackson Lamb
- Kristin Scott Thomas
- Jack Lowden
- Saskia Reeves
- Christopher Chung
- Aimee-Ffion Edwards
- Rosalind Eleazar
- Joanna Scanlan
- Samuel West
- Ruth Bradley
- Tom Brooke
- Jonathan Pryce
- Hugo Weaving
- Olivia Cooke
- Lenny Rush
Olivia Cooke returns as Sidonie “Sid” Baker, while Lenny Rush joins the cast as a new addition for the sixth season.
The ensemble remains an important part of the show’s identity. Jackson Lamb may lead the team, but the story continues to involve several agents whose individual histories and relationships affect the larger investigation.
Gary Oldman Returns as Jackson Lamb
Gary Oldman’s return remains one of the biggest parts of the Season 6 launch.
Oldman plays Jackson Lamb, the sharp-tongued leader of Slough House. The character oversees intelligence officers who have been moved away from more prestigious MI5 assignments.
Apple TV describes Lamb as brilliant and irascible, placing him at the center of the series’ unusual intelligence team.
The actor has continued to discuss his connection to the character ahead of the sixth-season premiere.
Recent coverage has also reported on Oldman’s earlier comments about retirement and his more recent acknowledgment that he may not be ready to step away from acting. His continued involvement means Jackson Lamb remains central to the current season.
Olivia Cooke Returns as Sid Baker
Olivia Cooke is also back for Season 6 as Sid Baker.
Apple TV specifically highlighted Cooke’s return when it released the Season 6 trailer announcement.
Sid has been an important character in the series since its first season, making her return relevant to the continuing story.
Her presence also connects the new season with earlier events involving the Slough House team.
The sixth season therefore does not start with an entirely new group of characters. It continues the established ensemble while introducing new developments and additional cast members.
Where Can You Watch Slow Horses Season 6?
Season 6 is streaming on Apple TV.
Apple TV’s official Season 6 page lists the series as an Apple TV title and identifies September 16, 2026, as the release date.
U.S. viewers need access to Apple TV to watch the new episodes.
The platform is also carrying the previous seasons, allowing viewers to revisit earlier episodes before starting the sixth season.
For anyone who has not watched the series recently, revisiting the previous seasons can help establish the relationships and ongoing storylines involving Jackson Lamb, River Cartwright, Diana Taverner and the wider MI5 world.
Is Season 6 Being Released All at Once?
No.
Apple TV has confirmed a weekly release schedule.
The first episode arrives on September 16, followed by one new episode every Wednesday. The sixth episode will serve as the Season 6 finale on October 21.
This approach means viewers will need to wait between episodes.
For fans who prefer to watch an entire season in one sitting, the complete six-episode run will not be available until after the October 21 finale.
The weekly schedule also means that the premiere and finale are separated by five weeks.
When Is the Slow Horses Season 6 Finale?
The Season 6 finale is scheduled for October 21, 2026.
Apple TV’s official release announcement confirms that the season will begin September 16 and continue weekly until October 21.
That makes October 21 the final scheduled release date currently confirmed for the sixth season.
The six-episode structure means the finale arrives after five weekly intervals following the premiere.
Until the final episode becomes available, details about its full outcome should not be treated as confirmed.
What Books Does Season 6 Adapt?
Season 6 adapts material from two Mick Herron novels: Joe Country and Slough House.
Apple TV identifies them as the sixth and seventh novels in the Slough House book series.
The use of two books provides the television adaptation with a substantial amount of source material for the latest story.
The series has continued to draw from Herron’s wider Slough House universe while adapting those stories for television.
Season 6’s connection to Joe Country and Slough House is therefore officially confirmed rather than speculation about which books the season might use.
What Has Apple TV Released for Season 6?
Apple TV has released several official promotional materials for the sixth season.
The platform unveiled a first look in June and later released the official trailer in August.
Apple TV’s official YouTube channel also published the Season 6 trailer, confirming September 16 as the premiere date.
The promotional material shows the returning characters facing another dangerous situation.
Apple TV also held the Season 6 world premiere at the Toronto International Film Festival ahead of the streaming debut. The event brought Gary Oldman and several returning cast members together in Toronto.
That premiere took place shortly before the official global release.
Slow Horses Season 6 Release Timeline
The key dates are now confirmed.
June 11, 2026: Apple TV announced the September 16 premiere and revealed the first look at Season 6.
August 18, 2026: Apple TV released the official Season 6 trailer and again confirmed the September 16 premiere.
September 12, 2026: Apple TV held the Season 6 world premiere at the Toronto International Film Festival.
September 16, 2026: Season 6 officially premieres on Apple TV.
October 21, 2026: The sixth and final episode is scheduled to arrive.
This timeline reflects confirmed announcements rather than projected dates.
Why September 16 Matters for Viewers
The September 16 release date answers the central question surrounding the sixth season.
There is no longer a need to wait for an announcement about when the season will arrive. Apple TV has already confirmed the date, the episode count and the weekly schedule.
For U.S. viewers, Season 6 begins today on Apple TV.
The first episode starts a six-week release period that ends with the finale on October 21.
The timing also gives viewers a chance to follow the story week by week. Each Wednesday brings another chapter in the latest Slough House mission.
What to Know Before Watching Season 6
Viewers preparing for the new season should keep several confirmed details in mind:
- Season 6 premieres September 16, 2026.
- Apple TV is releasing six episodes.
- New episodes arrive weekly.
- The finale is scheduled for October 21.
- Gary Oldman returns as Jackson Lamb.
- Olivia Cooke returns as Sid Baker.
- Kristin Scott Thomas, Jack Lowden, Saskia Reeves and other established cast members return.
- Lenny Rush joins the Season 6 cast.
- The season adapts Joe Country and Slough House.
- Apple TV is the streaming home for the new season.
These details come from Apple’s official Season 6 announcements and current series information.
The Latest Answer for Fans Waiting for Season 6
So, when does Slow Horses season 6 come out? The answer is September 16, 2026, and that date has now arrived.
Apple TV has confirmed the premiere, the six-episode order and the weekly release schedule. The season begins with its first episode on September 16 and continues each Wednesday through the October 21 finale.
The new season brings Gary Oldman back as Jackson Lamb and continues the story of the Slough House agents. It also brings back Olivia Cooke as Sid Baker and features a large returning ensemble alongside new addition Lenny Rush.
The story draws from Joe Country and Slough House, giving the sixth season a confirmed foundation in Mick Herron’s novels. Apple TV’s promotional material also establishes a dangerous new situation involving Diana Taverner and the Slough House team.
For U.S. viewers, the wait is officially over. Season 6 is now beginning its run on Apple TV, with the final episode scheduled for October 21.
Are you watching Season 6 as the new episodes arrive? Share your thoughts and stay updated as the latest Slough House story unfolds.