| Name | Character | Episodes |
|---|---|---|
| James McAvoy | Josh Malfen | 4 |
| Geraldine James | Joyce Malfen | 4 |
| Archie Panjabi | Alsana | 4 |
| Robert Bathurst | Marcus Malfen | 4 |
| Nasser Memarzia | Alim | 4 |
| Nina Wadia | Neena | 4 |
| Phil Davis | Archie | 4 |
| Naomie Harris | Clara | 4 |
| John Simm | Mr. Hero | 4 |
| Russell Brand | Merlin | 4 |
| Sophie Winkleman | Joely | 4 |
| Julian Barratt | Aide de Camp | 4 |
| Maggie O'Neill | Poppy | 4 |
| Rufus Jones | Crispin | 4 |
| Bryan Dick | Young Archie | 4 |
| Om Puri | Samad | 4 |
| Deepak Verma | Shiva | 4 |
| Vernon Dobtcheff | Devil of Dachau | 4 |
| Charlie Creed-Miles | Ryan Topps | 4 |
| Daniel Tuite | Paddy | 4 |
| San Shella | Young Samad | 4 |
| Christopher Simpson | Magid/Millat | 4 |
| Annie Cooper | Karina | 4 |
| Richard Butler | Mr. Hamilton | 4 |
| Paul Bhattacharjee | Bahadur Khan | 4 |
| Joy McBrinn | Racist Neighbour | 4 |
| Ian Thompson | Headmaster | 4 |
| David Langham | Young Devil of Dachau | 4 |
| Jeff Mirza | Mo | 4 |
| Steve Sweeney | Lager Lad/Neighbour | 4 |
| Jeanie Gold | Homeless Woman | 4 |
| Christopher Simpson | Magid / Millat | 2 |