| Keeley Hawes | Lindsay |
| Michael Nardone | O'Neill |
| Steve Toussaint | Mallick |
| Vicky McClure | Fleming |
| Martin Compston | Arnott |
| Tony Pitts | Hargreaves |
| Christina Chong | Rogerson |
| Adrian Dunbar | Hastings |
| Breige Roche | Georgia's Mum |
| Gavin Neilly | Georgia's Dad |
| Andrea Irvine | Roisin |
| Tara Lynne O'Neill | Lorna |
| Roseanna Barry | Michelle |
| Jeany Spark | Claire |
| Liz White | Jo |
| Mark Bonnar | Dryden |
| Henry Pettigrew | Cole |
| Claire Hackett | Tessa |
| Ian Beattie | Bob |
| Niall Macgregor | Rich |
| Richard Huw | Ronson |
| Philip Wright | Royal |
| Mark Asante | Custody Sgt |
| Laurence Doherty | 4th St Station DC
(uncredited) |
| Daniel Flynn | News Narrator
(uncredited) |
| Chrissie Harris | Police Officer AC-12
(uncredited) |
| Christine Harris | AC 12 Uniformed Officer
(uncredited) |
| Hugh Irvine | CSI Officer Burslem
(uncredited) |
| Simon Millar | Passerby
(uncredited) |