- Gary Oldman (Jackson Lamb)
- Jack Lowden (River Cartwright)
- Kristin Scott Thomas (Diana Taverner)
- Hugo Weaving (Frank Harkness)
- Saskia Reeves (Catherine Standish)
- Christopher Chung (Roddy Ho)
- Rosalind Eleazar (Louisa Guy)
- Aimee-Ffion Edwards (Shirley Dander)
Slow Horses — S6E5
Episode: Sayonara
Air Date: 2026-10-14
Runtime: 48 min
Overview
River goes after Sid. Lamb sets his sights on Cantor. Taverner carries on with a treacherous deal.