In season six, the Slow Horses are on the run as Diana Taverner embroils them all in a fatally high-stakes game of retaliation and revenge.
Episodes
1. Circle of Life
Sep 16, 2026 48m 8.4River braces for his grandfather's funeral. Lamb looks into the death of an ex–Slow Horse.
2. Daddy Issues
Sep 23, 2026 47m 8.7The reemergence of Frank Harkness and a suspicious string of murders put Lamb and team on high alert.
3. Resurrection
Sep 30, 2026 49m 7.8Ex–Slow Horses return to the fold as assassins close in. Taverner faces the fallout of her TV interview.
4. Lost & Found
Oct 7, 2026 50m 7.9Lamb tries figuring out who Frank is working for. Sid, River, and Coe do everything to evade the hit squad.
5. Sayonara
Oct 14, 2026 48mRiver goes after Sid. Lamb sets his sights on Cantor. Taverner carries on with a treacherous deal.
6. Judgement Day
Oct 21, 2026 1hThe safe house becomes unsafe as Lamb and Taverner finally join forces.