The wait is almost over for fans of the spy drama. Apple TV+ has officially set the return date for Slow Horses Season 6. The new season will premiere on September 16, 2026, bringing back Gary Oldman as the grumpy but brilliant Jackson Lamb. The show will follow its usual pattern of releasing one episode per week, with the season finale arriving on October 21, 2026.
This season adapts two novels from Mick Herron’s acclaimed Slough House series: Joe Country and Slough House. The story puts the team of disgraced MI5 agents in a dangerous position. They are forced to go on the run after MI5 deputy director Diana Taverner pulls them into a deadly game of revenge.
The series has become one of Apple TV+’s most popular shows. It has earned multiple BAFTA and Emmy nominations for its cast and crew. All five previous seasons are currently streaming on Apple TV+, allowing new viewers to catch up before the new season begins.
Slow Horses Season 6 Episode Release Schedule
Apple TV+ will release all six episodes of Slow Horses Season 6 on a weekly basis. Each new episode will arrive on Wednesday. Here is the complete release schedule:
- 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
This release pattern matches the show’s tradition. Slow Horses has released new seasons every September since season 4 arrived in 2024. The consistent schedule has helped the series build a loyal audience.
What Happens in Slow Horses Season 6
Season 6 takes the Slough House team into uncharted territory. The official synopsis from Apple TV states that “season six sees the Slow Horses on the run as Diana Taverner embroils them all in a fatally high-stakes game of retaliation and revenge”.
Diana Taverner, played by Kristin Scott Thomas, has become the top figure at MI5 headquarters. Her long-running conflict with Jackson Lamb reaches a new level. The power struggle between the exiled agents and MI5 leadership turns into something much more dangerous this time.
The season is based on two books from Mick Herron’s series. This is the first time the show has adapted two novels in one season. Gaby Chiappe takes over as showrunner for season 6, replacing Will Smith who ran the first five seasons. Christopher Chung, who plays Roddy Ho, mentioned that the change in showrunner might give the season “a slightly different flavour”.
The drama begins with the death of a former MI5 agent on a bus. This event sends River Cartwright to the Cotswolds for an undercover mission. Meanwhile, a meeting with an Oligarch ends in violence, creating a race against time to prevent a disaster. The season ties back to past decisions and their consequences, making the stakes higher than ever.
Cast and Characters Returning for Season 6
The main cast of Slow Horses is back for season 6. Gary Oldman returns as the cantankerous Jackson Lamb, the leader of Slough House. Jack Lowden is back as River Cartwright, the agent who started the series after a failed training exercise.
Other returning cast members include:
- 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
- Tom Brooke as J.K. Coe
- Jonathan Pryce as David Cartwright
- Hugo Weaving as Frank Harkness
- Samuel West as Peter Judd MP
- Ruth Bradley as Emma Flyte
- Joanna Scanlan as Moira Tregorian
Lenny Rush, a BAFTA TV Award winner, joins the cast for season 6 in a new role. His character has not been fully revealed yet, but first-look images show him alongside the Slough House team.
Rosalind Eleazar returns as Louisa Guy after her character left the Slough House team early in season 5. Joanna Scanlan and Hugo Weaving also come back after being absent from season 5.
Where to Watch Slow Horses Season 6
Slow Horses Season 6 will stream exclusively on Apple TV+. The premiere happens globally on September 16, 2026. Viewers in all regions where Apple TV+ operates will get the episodes on the same day.
All five previous seasons of Slow Horses are available on Apple TV+ right now. This gives new viewers plenty of time to watch the entire series before season 6 begins. The show has received strong reviews throughout its run. All five seasons hold a Certified Fresh score on Rotten Tomatoes, with two seasons earning a perfect 100 percent critics’ score.
Slow Horses Season 7 Already Confirmed
Apple TV+ has already confirmed Slow Horses Season 7. The seventh season will consist of six episodes, matching the pattern of previous seasons. It will be based on Mick Herron’s novel Bad Actors.
In season 7, Jackson Lamb and his team will work to find and stop a mole who has infiltrated the British government. Ben Vanstone will adapt the season, with Robert McKillop directing. A specific premiere date has not been announced yet. Reports suggest the season could arrive sometime in 2027.
The show’s future looks strong. Slow Horses has become a reliable hit for Apple TV+. The series has earned numerous award nominations, including for Oldman, Chung, Pryce and Lowden. Director Adam Randall won an Emmy for directing a drama series last year.
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What Makes Slow Horses Different
Slow Horses stands out from other spy shows because of its dark humour and flawed characters. The series follows British intelligence agents who have made career-ending mistakes. They end up at Slough House, a dumping ground department of MI5.
Jackson Lamb leads this team of rejects. He is brilliant but cantankerous, treating his agents with contempt while secretly protecting them. The show balances tense spy action with comedy, creating a unique tone that has attracted a global audience.
The series is produced by See-Saw Films, with a team of executive producers including Jamie Laurenson, Hakan Kousetta, Julian Stevens, Iain Canning, Emile Sherman, Adam Randall, Gail Mutrux, Douglas Urbanski and Gary Oldman himself.
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