| Name | Character | Episodes |
|---|---|---|
| Stephen Merchant | Stephen Port | 3 |
| Leanne Best | Kate | 3 |
| Robert Emms | Ricky | 3 |
| Alexa Davies | Kiera | 3 |
| Michael Jibson | DC Slaymaker | 3 |
| Rufus Jones | John Pape | 3 |
| Sheridan Smith | Sarah Sak | 3 |
| Isabella Laughland | China | 3 |
| Samuel Barnett | Ryan Edwards | 3 |
| Kris Hitchen | Tom Walgate | 3 |
| Ben Cartwright | Det. Sqt. O'Donnell | 3 |
| Shaun Thomas | Paul | 3 |
| Memet Ali Alabora | Sami Sak | 3 |
| Paddy Rowan | Jack Taylor | 2 |
| Daniel Ryan | Adam Whitworth | 2 |
| Jaime Winstone | Donna Taylor | 2 |
| Stephanie Hyam | Jenny Taylor | 2 |
| Holly Aird | Jeanette Taylor | 2 |
| Leo Flanagan | Daniel Whitworth | 2 |
| Shelley Conn | Nadia Persaud | 1 |
| Ian Puleston-Davies | Karl Turner MP | 1 |
| Michael Keogh | Dispatcher | 1 |
| Grant Crookes | Police Officer | 1 |
| James Bradshaw | DCI Tim Duffield | 1 |
| Milo Twomey | MIT Detective | 1 |
| Simon Bubb | Clerk Of The Court | 1 |
| Simon Bubb | Clerk to the Court | 1 |
| Andy Gathergood | PC Ellison, Medway Police Officer | 1 |
| Dean Fagan | Deptford Police Officer | 1 |
| John Alan Roberts | Family Court Member | 1 |
| Frankie Wilson | Barking Police Officer | 1 |