| Name | Character | Episodes |
|---|---|---|
| Eddie Redmayne | Stephen Wraysford | 2 |
| Richard Madden | Captain Weir | 2 |
| Clémence Poésy | Isabelle Azaire | 2 |
| Matthew Goode | Captain Gray | 2 |
| Joseph Mawle | Jack Firebrace | 2 |
| George MacKay | Private Douglas | 2 |
| Thomas Turgoose | Private Tipper | 2 |
| Paul Rattray | Tyson | 2 |
| Daniel Cerqueira | Shaw | 2 |
| Nicholas Moss | RSM Price | 2 |
| Matthew Aubrey | Private Byrne | 2 |
| Marie-Josée Croze | Jeanne | 2 |
| Rory Keenan | Private Brennan | 2 |