| Name | Character | Episodes |
|---|---|---|
| Chiwetel Ejiofor | Jonah Gabriel | 7 |
| Tobias Menzies | Ross (Journalist) | 7 |
| Christopher Eccleston | Joseph Bede | 7 |
| Stephen Rea | Gatehouse | 7 |
| Rafe Spall | Jay Wratten | 7 |
| Freddie Fox | Ratallack | 7 |
| Antony Sher | Peter Glickman | 7 |
| Robert Pugh | 7 | |
| Lesley Sharp | 7 | |
| Richard Lintern | 7 | |
| Kierston Wareing | Lia Honey | 7 |
| Eve Best | Petra Mayler | 7 |
| Tobias Menzies | Ross McGovern | 5 |
| Badria Timimi | Julie's Doctor | 2 |