Slow Horses Season 6 Release Schedule & Cast Guide: Premiere Date, Episodes and Cast
Slow Horses Season 6 is finally here. Apple TV is launching the sixth season of its acclaimed espionage drama on Wednesday, September 16, 2026, giving fans a new six-episode story led by Gary Oldman as Jackson Lamb.
The premiere arrives just days after Apple TV held the Season 6 world premiere at the Toronto International Film Festival on September 12. The event brought Oldman together with returning cast members including Olivia Cooke, Saskia Reeves, Christopher Chung, Rosalind Eleazar and Ruth Bradley.
The timing is a major reason “Slow Horses season 6” is trending now. The long-awaited return has moved from promotion and trailers to its actual weekly release schedule.
When Does Slow Horses Season 6 Premiere?
Slow Horses Season 6 premieres Wednesday, September 16, 2026, on Apple TV.
The season contains six episodes, with a new episode arriving each Wednesday through October 21. Apple TV confirmed the full schedule ahead of the premiere.
Slow Horses Season 6 Release 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 |
The weekly format means viewers should not expect all six episodes to arrive at once.
What Is Slow Horses Season 6 About?
Season 6 follows the Slow Horses as they become caught in another dangerous MI5 operation.
Apple TV says the new story puts the team on the run, while Diana Taverner becomes involved in a high-stakes situation centered on retaliation and revenge.
The season is adapted from Joe Country and Slough House, the sixth and seventh novels in Mick Herron’s Slough House series.
That gives Season 6 a different position within the adaptation timeline, bringing material from two of Herron’s novels into the six-episode television season.
Slow Horses Season 6 Cast
Gary Oldman returns as Jackson Lamb, the unconventional leader of the Slough House team.
The returning ensemble includes:
- Gary Oldman as Jackson Lamb
- Jack Lowden
- Kristin Scott Thomas
- Saskia Reeves
- Rosalind Eleazar
- Christopher Chung
- Aimee-Ffion Edwards
- Ruth Bradley
- Jonathan Pryce
- Tom Brooke
- Joanna Scanlan
- Hugo Weaving
- Olivia Cooke as Sidonie “Sid” Baker
Apple TV has also confirmed Lenny Rush as a new addition to the Season 6 cast.
Cooke’s return is particularly notable because Sid Baker has been absent from the central story for much of the series. Apple TV specifically highlighted her return in its Season 6 trailer announcement.
Why Slow Horses Season 6 Is Trending Now
The biggest trigger is simple: Season 6 premieres today, September 16.
Interest has also been building around the show’s recent awards recognition. At the 2026 Emmys, Slow Horses was nominated for Outstanding Drama Series, while Gary Oldman received another nomination for Outstanding Lead Actor in a Drama Series. Director Saul Metzstein won Outstanding Directing for a Drama Series for the episode “Scars.”
The Season 6 premiere also follows Apple’s September 12 world-premiere event at TIFF, which put the returning cast back in the spotlight only days before the global release.
For viewers searching now, the key information is therefore no longer whether Season 6 is coming. It has arrived, and the six-episode rollout has begun.
Where to Watch Slow Horses Season 6
Slow Horses Season 6 is streaming exclusively through Apple TV.
The first five seasons are also available on the service, making this a useful point for new viewers who want to catch up before starting the new season.
What Comes After Season 6?
The story does not end with Season 6.
Apple TV previously renewed Slow Horses for a seventh season, which will adapt Mick Herron’s Bad Actors. The seventh season was announced as another six-episode installment.
That means viewers can approach Season 6 knowing that the series has already been given another chapter beyond the current storyline.
For now, however, the focus is on Season 6, with the first episode arriving September 16 and the finale scheduled for October 21.
FAQs
When does Slow Horses Season 6 come out?
Season 6 premieres on September 16, 2026, on Apple TV.
How many episodes are in Slow Horses Season 6?
There are six episodes in Season 6.
When is the Slow Horses Season 6 finale?
The sixth and final episode is scheduled for October 21, 2026.
Is Gary Oldman returning for Season 6?
Yes. Gary Oldman returns as Jackson Lamb, the head of the Slough House team.
Is Olivia Cooke in Slow Horses Season 6?
Yes. Olivia Cooke returns as Sidonie “Sid” Baker.
