All you need to know about the upcoming ‘Slow Horses’ season 7: What to expect, where to watch, and more

With the ending of season 6 still leaving fans of ‘Slow Horses’ in shock, news and confirmation of the seventh season has been a rather welcome and tasteful update for everyone. While there is still time for fans to find out what happens to River Cartwright in season 7, here is everything else we already know about it.

How did ‘Slow Horses’ season 6 end?Season 6 of ‘Slow Horses,' titled ‘Judgment Day,' ends on a massive cliffhanger where River Cartwright, who is played by Jack Lowden, collapses from an apparent Novichok nerve agent poisoning after coming home to reunite with Sid Baker, played by Olivia Cooke. What is ‘Slow Horses’ season 7 going to be about?In July 2025, Deadline confirmed the news that a seventh season of ‘Slow Horses’ is in the works, and with the ending of season 6, fans are already debating what is going to go down in the coming season.

ELLE reported that according to the press release shared by the production house, the coming season of ‘Slow Horses’ “is adapted from the Bad Actors novel in the Mick Herron Slough House book series and sees Lamb and his Slow Horses on the hunt to find and neutralize a mole at the heart of the British Government before they can bring down the state.”The book, which is the eighth novel from the ‘Slough House’ series, is set around the Downing Street superforecaster Dr. Sophie de Greer and her disappearance.

The Prime Minister's adviser, Anthony Sparrow, then uses her disappearance for his own benefit to launch a political power grab. He makes an attempt to undermine MI5 and the organization’s chief, Diana Taverner.

Jackson Lamb and his outcasts then investigate the matter, uncovering a Russian GRU plot involving a faked death. Who all will be returning for ‘Slow Horses’ season 7?The leading faces, including Gary Oldman, Jack Lowden, Kristin Scott Thomas, Jonathan Pryce, Hugo Weaving, Saskia Reeves, Rosalind Eleazar, Christopher Chung, Aimee-Ffion Edwards, Joanna Scanlan, Tom Brooke, James Callis, Lucian Msamati, and Olivia Cooke, are all going to be returning for season 7 of ‘Slow Horses.'There are also a couple of new additions to the coming season as well.

Varada Sethu, Ethan Moorhouse, Tuppence Middleton, Merab Ninidze, and Joshua Mc Guire are all going to be joining the show for the coming season. When and where to watch ‘Slow Horses’ season 7As of right now, there is no confirmed date for the seventh season of ‘Slow Horses.' However, since season 6 premiered in September 2026, and season 5 premiered in September 2025, the upcoming season may also possibly be released sometime around fall next year.

The show will be available for streaming on Apple+.

Key quotes

• “is adapted from the Bad Actors novel in the Mick Herron Slough House book series and sees Lamb and his Slow Horses on the hunt to find and neutralize a mole at the heart of the British Government before they can bring down the state.”