Apple TV releases “Slow Horses” Season 6 trailer ahead of Sept 16 premiere

Apple TV has released the official trailer for the sixth season of its Emmy-winning spy drama "Slow Horses," setting the stage for the Gary Oldman-led series' return. The new season is scheduled to premiere globally on Wednesday, September 16, 2026, with new episodes airing weekly through October 21, 2026.

The trailer, unveiled on August 18, provides the first substantial look at the upcoming six-episode run. Based on author Mick Herron's novels "Joe Country" and "Slough House," Season 6 finds the dysfunctional team of British intelligence agents at MI5's Slough House on the run. The synopsis indicates they are being hunted by a pair of anonymous assassins, embroiled in a "fatally high-stakes game of retaliation and revenge" orchestrated by senior MI5 official Diana Taverner, played by Kristin Scott Thomas.

Returning cast members include Gary Oldman as the cantankerous Jackson Lamb, Jack Lowden as River Cartwright, and the ensemble featuring Rosalind Eleazar, Christopher Chung, Saskia Reeves, and Hugo Weaving, who reprises his role as Frank Harkness. A notable return is that of Olivia Cooke as Sidonie "Sid" Baker, an operative previously believed to be killed in the show's first...