Hailed as “undoubtedly the best spy series on television", the Apple TV+ hit drama is adapted from Mick Herron’s best-selling books - and series 7 of Slow Horses is based on Herron’s Bad Actors, the eighth book in the award-winning Slough House series.

Apple TV+ has renewed the darkly comedic spy drama “Slow Horses” for a seventh season which will once again consist of six episodes. The Emmy and BAFTA Award-winning series, based on Mick Herron’s hit novels,

The fifth season will premiere in September 2025, but already, the show has been renewed for its sixth and seventh. But what about beyond that? Read on for everything we know about a Slow Horses Season 8, from the cast to the Mick Herron book on which it could be based.