There's more Slow Horses coming this fall.
The Apple TV+ spy thriller, based on Mick Herron's Slough House novels, centers around the MI5's "dumping ground department," known as Slough House. The series follows the dysfunctional British intelligence agents who "end up in Slough House due to their career-ending mistakes as they frequently find themselves blundering around the smoke and mirrors of the espionage world." Gary Oldman leads the group as Jackson Lamb, and he will be back for more in Slow Horses season four.
With the news of Slow Horses's first Emmy nominations (the show earned nine nods for its third season), here's everything we know so far about the upcoming season:
The season will be based on Spook Street by Mick Herron.
Slow Horses will continue to draw from Herron's books, with season four's plot coming from book four, Spook Street. Per the official description of the novel, "What happens when an old spook loses his mind? Does the Service have a retirement home for those who know too many secrets but don’t remember they’re secret? Or does someone take care of the senile spy for good? These are the paranoid concerns of David Cartwright, a Cold War–era operative and one-time head of MI5 who is sliding into dementia, and questions his grandson, River, must figure out answers to now that the spy who raised him has started to forget to wear pants. But River, himself an agent at Slough House, MI5’s outpost for disgraced spies, has other things to worry about. A bomb has detonated in the middle of a busy shopping center and killed forty innocent civilians. The 'slow horses' of Slough House must figure out who is behind this act of terror before the situation escalates."
Season four will begin with this bombing, which per Apple TV+, "detonates personal secrets, rocking the already unstable foundations of Slough House."
Gary Oldman leads the cast.
The full returning cast is as follows:
- Gary Oldman as Jackson Lamb
- Kristin Scott Thomas as Diana Tavener
- Jack Lowden as River Cartwright
- Saskia Reeves as Catherine Standish
- Rosalind Eleazar as Louisa Guy
- Christopher Chung as Roddy Ho
- Aimee-Ffion Edwards as Shirley Dander
- Kadiff Kirwan as Marcus Londridge
- Jonathan Pryce as David Cartwright
In addition, there will be five new cast members in season four:
- Hugo Weaving as Frank Harkness,
- Joanna Scanlan as Moira Tregorian,
- Ruth Bradley as Emma Flyte,
- Tom Brooke as J.K. Coe, and
- James Callis as Claude Whelan
Slow Horses season 4 will premiere on September 2, 2024.
There will be a two episode premiere on September 2, followed by one new episode weekly on Wednesdays through the season four finale on October 2. A fifth season is already in the works, based on Herron's London Rules.
While we wait, the first three seasons of Slow Horses are now streaming on Apple TV+
Emily Burack (she/her) is the Senior News Editor for Town & Country, where she covers entertainment, culture, the royals, and a range of other subjects. Before joining T&C, she was the deputy managing editor at Hey Alma, a Jewish culture site. Follow her @emburack on Twitter and Instagram.
