- Keira Knightley (Helen Webb)
- Ben Whishaw (Sam Young)
- Sarah Lancashire (Mrs. Reed)
- Andrew Buchan (Wallace)
- Ella Lily Hyland (Williams)
Episode: P Is for Poison
Air Date: 2026-11-05
Runtime: 49 min
Sam grapples with the fallout of a desperate choice. Helen presses an old foe for answers on Reed and Wildflower before a tense dinner with the Chernovs.