| Name | Character | Episodes |
|---|---|---|
| Bertie Carvel | Adam Dalgliesh | 12 |
| Jeremy Irvine | Charles Masterson | 4 |
| Alistair Brammer | DS Daniel Tarrant | 4 |
| Carlyss Peer | Kate Miskin | 4 |
| Siobhán Cullen | Josephine Fallon | 2 |
| Natasha Little | Matron Mary Taylor | 2 |
| Richard Dillane | Stephen Courtney-Briggs | 2 |
| Jim Norton | Father Barnes | 2 |
| James Cartwright | Stephen Lampart | 2 |
| Fra Fee | Dominic Swayne | 2 |
| Jonjo O'Neill | Julius Marsh | 2 |
| Jane Lapotaire | Lady Lavinia | 2 |
| Fenella Woolgar | Sister Gearing | 2 |
| Amanda Root | Sister Brumfett | 2 |
| Eliot Salt | Madeline Goodale | 2 |
| Mirren Mack | Maggie Hewson | 2 |
| John Hollingworth | Eric Hewson | 2 |
| Barry Aird | DI Daniel | 2 |
| Paul Mallon | Dennis | 2 |
| Jenny Howe | Grace | 2 |
| Robin Soans | Major Rupert Arkwright | 2 |
| Patrick Regis | Gordon Halliwell | 2 |
| Debbie Chazen | Blanche Fielding | 2 |
| Alyth Ross | Brenda Pridmore | 2 |
| Lily Newmark | Morag Smith | 2 |
| Steven Mackintosh | Wilfred Antsey | 2 |
| David Pearse | Miles Kynaston | 1 |
| Brid Brennan | Mrs. Dettinger | 1 |
| Tilly Vosburgh | Miss Wharton | 1 |
| Kieran O'Reilly | Henry Yates | 1 |
| Julia Dearden | Mrs Hurrell | 1 |
| Laura Hughes | Librarian | 1 |
| Beccy Henderson | Heather Pearce | 1 |