- Keira Knightley (Helen Webb)
- Ben Whishaw (Sam Young)
- Sarah Lancashire (Mrs. Reed)
- Andrew Buchan (Wallace)
- Ella Lily Hyland (Williams)
Episode: Put Your Head on My Shoulder
Air Date: 2026-11-05
Runtime: 54 min
Helen realizes her investigation into Reed's mysterious past connects to Sam's new targets — just after he silences their best hope for answers.