- Keira Knightley (Helen Webb)
- Ben Whishaw (Sam Young)
- Sarah Lancashire (Mrs. Reed)
- Andrew Buchan (Wallace)
- Ella Lily Hyland (Williams)
Episode: In the Bleak Midwinter
Air Date: 2024-12-05
Runtime: 54 min
Armed with evidence and bent on vengeance, Helen goes searching for the Clarks. As the conspiracy starts to unravel, she has a deadly decision to make.