‘Slow Horses’ Gets Very Early Renewal for Season 7

Meredith Jacobs July 8, 2025, 11:16 am

Gary Oldman as Jackson Lamb — 'Slow Horses' Season 5 — Apple TV+

“I know that Gary [Oldman] has expressed a desire to play Lamb forever and that Mick [Herron] is still writing the books, so I hope it will go for as long as people want it,” Slow Horses executive producer Will Smith told TV Insider in October 2024.

The Apple TV+ drama had already been renewed through its sixth season, ahead of the fifth premiering in September. And on Tuesday, July 8, the streaming service revealed that it will be coming back for more after that. Read on for everything we know about Slow Horses Season 7, from the cast to the Mick Herron book on which it will be based.

Has Slow Horses been renewed for Season 7?

Yes! On July 8, Apple TV+ announced that the series has been renewed for a six-episode Season 7.

“Slow Horses has won fans all over the world with its unique mix of self-deprecating British humor and high-octane action. I’m delighted viewers will have another season to enjoy Gary’s magnificent performance as Jackson Lamb alongside the Slow Horses slightly inept spycraft,” said Jay Hunt, creative director, Europe, Apple TV+, in a statement.

On which Mick Herron book will Slow Horses Season 7 be based?

The first five seasons of Slow Horses each cover a book of Herron’s series: Slow Horses, Dead Lions, Real Tigers, Spook Street, and London Rules. However, Season 6 will be based on the sixth and seventh books, Joe Country and Slough House. That left, of Herron’s books already published (not counting the novellas) to be adapted, Bad Actors for Season 7. Apple TV+’s announcement confirmed that will be the case. The book’s synopsis reads as follows:

“In London’s MI5 headquarters a scandal is brewing that could disgrace the entire intelligence community. The Downing Street superforecaster—a specialist who advises the Prime Minister’s office on how policy is likely to be received by the electorate—has disappeared without a trace. Claude Whelan, who was once head of MI5, has been tasked with tracking her down. But the trail leads him straight back to Regent’s Park itself, with First Desk Diana Taverner as chief suspect. Has Taverner overplayed her hand at last? Meanwhile, her Russian counterpart, Moscow intelligence’s First Desk, has cheekily showed up in London and shaken off his escort. Are the two unfortunate events connected? Over at Slough House, where Jackson Lamb presides over some of MI5’s most embittered demoted agents, the slow horses are doing what they do best, and adding a little bit of chaos to an already unstable situation… There are bad actors everywhere, and they usually get their comeuppance before the credits roll. But politics is a dirty business, and in a world where lying, cheating and backstabbing are the norm, sometimes the good guys can find themselves outgunned.”

There are also novellas and a novel that will be published in September, Clown Town, to be adapted in future seasons.

“Mick has talked about doing a standalone, not from a book, so I’m sure that’s possible,” Smith told TV Insider in October 2024. He also shared that there’s quite a bit of “material in the Slough House world to be mined,” including “a couple of novels that Mick’s done that introduced characters that then come into Slough House that flesh out the backstories.”

What will Slow Horses Season 7 be about?

In season 7, according to Apple TV+, Lamb and his Slow Horses are on the hunt to find and neutralise a mole at the heart of British Government before they can bring down the state.

Who’s in the Slow Horses Season 7 cast?

It’s too soon to tell. The Season 5 cast includes Gary Oldman (Jackson Lamb), Kristin Scott Thomas (Diana Taverner), Jack Lowden (River Cartwright), Saskia Reeves (Catherine Standish), Rosalind Eleazar (Louisa Guy), Christopher Chung as (Roddy Ho), Aimee-Ffion Edwards (Shirley Dander), Ruth Bradley (Emma Flyte), James Callis (Claude Whelan), Tom Brooke (J.K. Coe), and Jonathan Pryce (David Cartwright).

The series is produced for Apple TV+ by See-Saw Films, with Jamie Laurenson, Hakan Kousetta, Iain Canning, Emile Sherman, Dan Hassid, Mick Herron, Gail Mutrux, Douglas Urbanski, and Gary Oldman serving as executive producers. Season 7 is adapted for television and executive produced by Ben Vanstone, with Robert McKillop set to direct. See-Saw Films is part of the Mediawan group.

When will Slow Horses Season 7 premiere?

It’s too soon to tell. Season 5 will drop on Apple TV+ from September 24 through October 29, 2025. Season 6 has already been filmed, and it could be released any time in 2026. Season 7, pending on when filming wraps, could even be released at the end of 2026 or sometime in 2027.