| Name | Character | Episodes |
|---|---|---|
| Aidan Gillen | Harry | 1 |
| Ciarán Hinds | Martin Pitt | 1 |
| Tim Roth | Peter Pike | 1 |
| Phyllis Logan | Andrea | 1 |
| Rosanna Arquette | Sarah | 1 |
| Imelda Staunton | Cheryl Newman | 1 |
| Janet McTeer | Dr Juliet Horwitz | 1 |
| Brenda Blethyn | Miss A | 1 |
| T. P. McKenna | Michael Flynn | 1 |
| Diana Rigg | Lydia | 1 |
| David Suchet | Joe | 1 |
| Kenneth Cranham | Joe Shawcross | 1 |
| Kenneth Cranham | Peter | 1 |
| Richard Wilson | Max | 1 |
| David Calder | Douglas | 1 |
| James Fox | Nick Verney | 1 |
| Karl Johnson | Charles | 1 |
| Marsha Hunt | Elvi Rogers | 1 |
| Ronald Fraser | Apcar | 1 |
| Eleanor Bron | Lady Elspeth MacIlvrae | 1 |
| Angus MacInnes | Barney Bascoe | 1 |
| Andrew Keir | John Tagg | 1 |
| Polly Hemingway | Nurse Nimmo | 1 |
| Elaine Paige | Betty | 1 |
| Joanna David | Elizabeth | 1 |
| Antony Sher | Captain Edmund Lambert | 1 |
| Jon Finch | Finn | 1 |
| Lindsay Duncan | Gutrune Day | 1 |
| Harry Andrews | Arthur | 1 |
| Nigel Hawthorne | John | 1 |
| Kenny Ireland | Norman Jarvis | 1 |
| Mark Lewis Jones | Constable Davis | 1 |
| Jack Shepherd | Malcolm Sloman | 1 |
| Jack Shepherd | Paul | 1 |
| Maurice Roëves | Jack Lawrence | 1 |
| Stephen Moore | Charlie | 1 |
| Oliver Cotton | Andrew Ford | 1 |
| Ciaran Madden | Catherine | 1 |
| Jonathan Kells Phillips | Philip Colthard | 1 |
| Geoffrey Whitehead | Maurice | 1 |
| Bill Paterson | Alex McPherson | 1 |
| Linda Henry | Carol Fairwater | 1 |
| Roy Marsden | David Caesar | 1 |
| Katy Murphy | Ishbel | 1 |
| Sandra Voe | Sister McCabe | 1 |
| Ivor Roberts | Mr Thackeray | 1 |
| Simon Oates | Politician | 1 |
| Rod Culbertson | Superintendent Benson | 1 |
| Hilda Fenemore | Mrs Thackeray | 1 |
| Susan Wooldridge | Lady Alice Napier | 1 |
| Duncan Duff | Brian | 1 |
| Edna Doré | Betty | 1 |
| Pip Donaghy | Martin | 1 |
| Alex McCrindle | Wilf | 1 |
| Martin Cochrane | Murray | 1 |
| Tom Watson | Jock McGinn | 1 |
| Ian Carmichael | White | 1 |
| Frederick Warder | Ferdi | 1 |
| Clare Grogan | Anne | 1 |
| Rachel Robertson | Young Betsy Hall | 1 |
| Stuart Davids | Michael | 1 |
| Leslie Sands | Tom | 1 |
| Lynn Anderson | Betsy Hall | 1 |
| Harold Innocent | Napoleon | 1 |