Kyle Soller, widely recognized for his portrayal of the repressed bureaucrat Syril Karn in the Disney+ series Andor, is pivoting to a more kinetic type of antagonism. Apple TV+ has confirmed that Soller will join the cast of Slow Horses for its upcoming sixth season, taking on the role of a character named Jim.
Unlike his meticulously dressed and office-bound character in the Star Wars universe, Soller’s new role is described as an assassin. This casting signals a shift toward a more overtly physical threat for the residents of Slough House. Production for the sixth season officially commenced in London in September 2026, continuing the series’ rapid production cycle.
Adapting Joe Country
The sixth season is expected to draw heavily from Joe Country, the sixth novel in Mick Herron’s acclaimed Slough House spy series. In the source material, the narrative shifts from the urban grit of London to a high-stakes hunt across a snow-covered countryside. This setting provides a distinct backdrop for Soller’s character, Jim, to operate as a lethal foil to Jackson Lamb’s team of “slow horses.”
While the series has generally followed a “one book per season” format, some reports suggest that Season 6 may combine elements of two books to streamline the narrative arc. This approach has been hinted at by production staff looking to maintain the show’s tight pacing as it explores the increasingly personal stakes for the MI5 outcasts.
A Transition in Villainy
For Soller, the move to Slow Horses represents a transition from “bureaucratic villainy” to the role of a professional killer. In Andor, his character represented the banality of evil—a man obsessed with order and authority. As Jim the assassin, Soller is expected to engage in the more kinetic, lethal side of the espionage genre, fitting into the “dogs” versus “horses” dynamic that defines the show’s internal MI5 politics.
Based on previous production schedules for the series, which often see seasons air approximately a year after filming begins, fans can likely expect the sixth season to premiere in late 2027. This follows the established pattern of Apple TV+ maintaining a consistent presence for the franchise, which has become a cornerstone of its drama lineup.
