Doug Urbanski says Gaby Chiappe will lead after Will Smith’s exit as ‘Slow Horses’ returns Sept. 16

Apple TV+’s critically acclaimed spy drama “Slow Horses” will return for season 6 on Sept. 16, and the series’ executive producer Doug Urbanski addressed what changes after showrunner Will Smith’s exit. In an interview published Aug. 13, Urbanski described how the production team is adjusting to new leadership while maintaining continuity in tone and storytelling for the next chapter of the Slough House operation.

Urbanski said that Gaby Chiappe stepped into the showrunner role following Smith’s departure. According to the interview, the transition was managed within the existing creative team, with Chiappe assuming responsibility for overseeing season 6 as the series continues its established rhythm of desk-based counterintelligence, internal politics, and fieldwork that repeatedly derails official plans.

The interview also laid out the structural approach for the new season. Urbanski said season 6 combines story elements from two Mick Herron novels, pointing to a planning rationale that shapes how plots are paced and how characters’ story lines intersect across episodes. The adaptation approach affects not only what viewers will see, but also how the writers room assembles arcs, since blending multiple source paths can require different episode-level beats to keep the season cohesive.

“Slow Horses” has built its audience around ensemble characters operating in the shadows of British intelligence, where competence is rare and improvisation is routine. Urbanski’s comments place the leadership change and source-combination strategy in the context of keeping those ensemble dynamics intact. The production’s goal for season 6, as described in the interview, is to preserve the series’ established framework even as it reshuffles who is steering the showrunner seat.

Season 6’s arrival on Sept. 16 also positions it in the fall streaming calendar, when network and platform schedules often compete for attention and subscriptions. Apple TV+ has leaned on “Slow Horses” as a flagship drama, and a showrunner change can be a stress test for studios and platforms because it can affect continuity across scripts, performance direction, post-production, and marketing timelines. Urbanski’s explanation centers on continuity planning rather than a reinvention of the series’ foundation.

Urbanski did not frame the season as a total reset, and the interview emphasizes that the show’s approach for season 6 is part of an ongoing arc. By coupling two Herron novels and assigning Chiappe showrunning duties, the production is indicating that it will continue to treat the series as an adaptation-driven project with a defined creative pipeline, even as personnel shifts in the top role.

For viewers, the practical takeaway is timing and creative leadership. The show remains scheduled to debut season 6 on Sept. 16, with Chiappe now serving as the showrunner and the season’s narrative structure guided by a two-novel adaptation plan. The next episodes will be the first to reflect the new oversight at the show’s highest writing and production level following Smith’s departure.

The show’s behind-the-scenes shift also raises questions that studios typically answer only after a season airs, including how writers, directors, and department heads coordinate under the new showrunner and how the adaptation strategy plays on screen. Still, the interview gives a clear framework for what to expect: a Sept. 16 return, a leadership handoff to Chiappe, and a season built around multiple Mick Herron books arranged into a single television season.