| Set on a sleeper train traveling from Glasgow to London, a government agency desperately tries to intervene in the rapidly-escalating events onboard. Can two people who've never met, one on the train and one not, work together to save the lives of its disparate group of passengers as the Heart of Britain service hurtles towards what might quite literally be its final destination? |
| Name | Character | Episodes |
|---|---|---|
| Joe Cole | Joe Roag | 6 |
| James Cosmo | Fraser Warren | 6 |
| David Threlfall | Paul Peveril | 6 |
| Sharon Small | Liz Draycott | 6 |
| Katie Leung | Rachel Li | 6 |
| Alexandra Roach | Abby Aysgarth | 6 |
| Alex Ferns | Arran Moy | 6 |
| Jonjo O'Neill | Mark Hudson | 6 |
| Parth Thakerar | Saj Sidhu | 6 |
| Scott Reid | Billy McCloud | 6 |
| Sharon Rooney | Yas Brown | 6 |
| Ruth Madeley | Chrissy Doolan | 6 |
| Gabriel Howell | Tobi McKnight | 6 |
| Pamela Nomvete | Nicola Miller | 6 |