Jack leads the hunt for suspected killer Bruno, the brother of the Polish teenager shot by the armed police, and enters London's small but devastating gun trade.
| Name | Type | Role | |
|---|---|---|---|
| Tracey Malone | Writer | ||
| Matthew Arlidge | Writer | ||
| Neil Stuke | Guest Star | DI Laurence Cooke | |
| Daniela Denby-Ashe | Guest Star | Julia Lubas | |
| Oliver Ebsworth | Guest Star | Bobby Wilson | |
| Alicya Eyo | Guest Star | Jo Keating | |
| Renée Castle | Guest Star | Rachel Sharpe | |
| Charlotte Emmerson | Guest Star | Sheila Friend | |
| Steven Miller | Guest Star | Steve Monk | |
| Suzanna Hamilton | Guest Star | Gabriella Lubas | |
| Alton Milne | Guest Star | Armed Police Trainee | |
| Paul Brennen | Guest Star | Geoff Ward | |
| Phil Rowson | Guest Star | Tim Friend | |
| Marko Leht | Guest Star | Bruno Lubas | |
| Ami Metcalf | Guest Star | Lisa Wilson | |
| Keith Boak | Director |