- Keira Knightley (Helen Webb)
- Ben Whishaw (Sam Young)
- Sarah Lancashire (Mrs. Reed)
- Andrew Buchan (Wallace)
- Ella Lily Hyland (Williams)
Episode: Go Bang Time
Air Date: 2024-12-05
Runtime: 56 min
Investigations into the ambassador's death reach the highest corridors of power. Helen pays a risky visit to an old friend, and Sam faces a tough choice.