Slow Horses: Season 6

2026 · 6 episodes · ★ 8.2

What Season 6 of Slow Horses

The Slow Horses are forced to flee Slough House. Diana Taverner pulls them into a game of retaliation and revenge with a lot at stake, and Jackson Lamb has to make his move with a disorganized team. River Cartwright is still dealing with the demotion that has fallen on him and, at the same time, is preparing for his grandfather's funeral. Lamb wants to find out who Frank Harkness works for, and his reappearance changes everything. Former Slow Horses return to the group, while Sid, Coe and River try to escape a pair of thugs. Taverner, for her part, bears the consequences of her television appearance.

6episodes

Sep 16, 2026premiered

Oct 21, 2026final episode

5.1 hrtotal runtime

Season 6 Episodes

6x01 Circle of Life
Sep 16, 2026 · 48 min · ★ 8.3
River braces for his grandfather's funeral. Lamb looks into the death of an ex–Slow Horse.
Directing: Adam Randall · Writer: Gaby Chiappe · Starring: Paul Higgins, Samuel West, Bally Gill, Ruth Bradley
6x02 Daddy Issues
Sep 23, 2026 · 47 min · ★ 8.6
The reemergence of Frank Harkness and a suspicious string of murders put Lamb and team on high alert.
Directing: Adam Randall · Writer: Edward Docx · Starring: Olivia Cooke, Samuel West, Naomi Wirthner, Ruth Bradley
6x03 Resurrection
Sep 30, 2026 · 49 min · ★ 7.8
Ex–Slow Horses return to the fold as assassins close in. Taverner faces the fallout of her TV interview.
Directing: Adam Randall · Writer: Sophie Goodhart · Starring: Rosalind Eleazar, Olivia Cooke, Ruth Bradley, Joanna Scanlan
6x04 Lost & Found
Oct 7, 2026 · 50 min · ★ 8.1
Lamb tries figuring out who Frank is working for. Sid, River, and Coe do everything to evade the hit squad.
Directing: Adam Randall · Writers: Jonny Stockwood, Mark Denton · Starring: Rosalind Eleazar, Olivia Cooke, Ruth Bradley, Joanna Scanlan
6x05 Sayonara
Oct 14, 2026 · 48 min · ★ 8.4
River goes after Sid. Lamb sets his sights on Cantor. Taverner carries on with a treacherous deal.
Directing: Adam Randall · Writing: Sophie Goodhart · Starring: Rosalind Eleazar, Olivia Cooke, Samuel West, Ruth Bradley
6x06 Judgement Day Season Finale
Oct 21, 2026 · 62 min · ★ 8.1
The safe house becomes unsafe as Lamb and Taverner finally join forces.
Directing: Adam Randall · Writing: Gaby Chiappe · Starring: Rosalind Eleazar, Olivia Cooke, Ruth Bradley, Joanna Scanlan