| Name | Character | Episodes |
|---|---|---|
| Ben Whishaw | Freddie Lyon | 12 |
| Dominic West | Hector Madden | 12 |
| Romola Garai | Bel Rowley | 12 |
| Oona Chaplin | Marnie Madden | 12 |
| Anna Chancellor | Lix Storm | 12 |
| Julian Rhind-Tutt | Angus McCain | 12 |
| Vanessa Kirby | Ruth Elms | 6 |
| Hannah John-Kamen | Rosa Maria Ramírez | 6 |
| Burn Gorman | Thomas Kish | 6 |
| Peter Capaldi | Randall Brown | 6 |
| Anton Lesser | Clarence Fendley | 6 |
| Juliet Stevenson | Lady Elms | 6 |
| Peter Sullivan | Commander Laurence Stern | 6 |
| Tim Pigott-Smith | Lord Elms | 6 |
| John Bowe | Douglas Owen | 6 |
| Joe Cole | Trevor | 3 |
| Paul Chahidi | Ron | 1 |