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Season 6

2026 · 6 episodes

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.

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Episodes

1Circle of LifeRiver braces for his grandfather's funeral. Lamb looks into the death of an ex–Slow Horse.
2Daddy IssuesThe reemergence of Frank Harkness and a suspicious string of murders put Lamb and team on high alert.
3ResurrectionEx–Slow Horses return to the fold as assassins close in. Taverner faces the fallout of her TV interview.
4Lost & FoundLamb tries figuring out who Frank is working for. Sid, River, and Coe do everything to evade the hit squad.
5SayonaraRiver goes after Sid. Lamb sets his sights on Cantor. Taverner carries on with a treacherous deal.
6Judgement DayThe safe house becomes unsafe as Lamb and Taverner finally join forces.