| Name | Character | Episodes |
|---|---|---|
| Ian McKellen | Freddie Thornhill | 12 |
| Derek Jacobi | Stuart Bixby | 12 |
| Iwan Rheon | Ash Weston | 12 |
| Frances de la Tour | Violet Crosby | 12 |
| Marcia Warren | Penelope | 12 |
| Philip Voss | Mason Thornhill | 12 |
| Judi Dench | 1 | |
| Celia Imrie | Lillian | 1 |
| Luke Treadaway | 1 | |
| Christopher Villiers | 1 | |
| Samuel Barnett | 1 | |
| Michael Cochrane | 1 | |
| Richard Gadd | Delivery Man | 1 |
| Philip Anthony | Rowan | 1 |