| Name | Character | Episodes |
|---|---|---|
| Rufus Sewell | Mike Costain | 1 |
| Maggie Smith | Mrs. Mabel Pettigrew | 1 |
| Helena Bonham Carter | Jo Marriner | 1 |
| Tim Roth | Nick Finchley | 1 |
| Zoë Wanamaker | Olive Mannering | 1 |
| Clive Owen | Paul | 1 |
| Charles Dance | Paul Hatcher | 1 |
| Phyllis Logan | Anne | 1 |
| Imelda Staunton | The Producer | 1 |
| Brian Dennehy | James Boyce | 1 |
| Edward Fox | 1 | |
| Edward Fox | Monk Scott | 1 |
| Ian Holm | F.R. Leavis | 1 |
| Alan Cumming | Tulloch | 1 |
| Pete Postlethwaite | Panter | 1 |
| Pete Postlethwaite | Kecks McGuinness | 1 |
| Pete Postlethwaite | The Dipper | 1 |
| Pete Postlethwaite | Mitch | 1 |
| Barry Foster | Derek | 1 |
| George Baker | Greaves | 1 |
| Nicholas Jones | Detective Inspector | 1 |
| Lesley Manville | Sophie | 1 |
| Stephen Rea | Frankie | 1 |
| James Fleet | Peter Wentworth | 1 |
| James Fleet | Bob | 1 |
| James Fleet | Prime Minister | 1 |
| Helen McCrory | Jo | 1 |
| Harriet Walter | Amelia Cleverly | 1 |
| Stephen Fry | Humphrey Taylor | 1 |
| Richard Wilson | Sir Hugo Armstrong | 1 |
| Kevin McNally | Stuart Thorn | 1 |
| Kevin McNally | Tommy O'Neill | 1 |
| Anna Massey | Nina | 1 |
| Celia Imrie | Victoria Bridgewater | 1 |
| Michael Hordern | Lord Langland | 1 |
| Michael Hordern | Godfrey Colston | 1 |
| Tom Wilkinson | Dr. Middleton | 1 |
| Tom Wilkinson | Father McAteer | 1 |
| Tom Wilkinson | Home Secretary | 1 |
| Tom Wilkinson | David Hanratty | 1 |
| Julian Firth | Bates | 1 |
| Lee Remick | Grace Gardner | 1 |
| Jerry Stiller | Marty de Reske | 1 |
| Leo McKern | Sir Arthur Quiller-Couch | 1 |
| Cyril Cusack | Percy Mannering | 1 |
| John Gielgud | 1 | |
| Ronald Pickup | Brian Silcott | 1 |
| Helen Baxendale | Ruth Clarke | 1 |
| Rita Davies | Picket at clinic | 1 |
| Paul Maxwell | Bill Freed | 1 |
| Derek Fowlds | Cumbridge | 1 |
| Georgie Glen | Margaret Summer | 1 |
| Roger Lloyd Pack | David Power | 1 |
| Gary Waldhorn | Deferre | 1 |
| Gary Waldhorn | Boris | 1 |
| Renée Asherson | Charmian Colston | 1 |
| Norman Bird | Grandfather | 1 |
| Leslie French | The Major | 1 |
| Richard Briers | Old Arthur/George | 1 |
| John Cater | Old Man | 1 |
| Bernard Hill | John | 1 |
| Harry Andrews | Matey | 1 |
| Roger Hammond | Tudor Hamilton | 1 |
| Ian Bannen | Hubert Stout | 1 |
| Pauline Collins | Sylvia Barker | 1 |
| Eileen Atkins | Helen Marriner | 1 |
| Ronan Vibert | Charles Fieldhouse | 1 |
| Doreen Mantle | Landlady | 1 |
| Maurice Denham | Guy Leet | 1 |
| Constance Chapman | Mrs Edwards | 1 |
| Georgine Anderson | Elsie Mont | 1 |
| Georgine Anderson | Old Lady | 1 |
| Francis Matthews | Silver-Haired Gent | 1 |
| Niall Tóibín | Malachy | 1 |
| Stella Gonet | Marigold | 1 |
| T.R. Bowen | Sylvia's Lover | 1 |
| Lynda Bellingham | Mary Morris | 1 |
| Amanda Redman | Kate | 1 |
| Thora Hird | Jean Taylor | 1 |
| Geoffrey Whitehead | Chief Constable Christie | 1 |
| Geoffrey Whitehead | Asst. Chief Constable Turpin | 1 |
| Daniel J. Travanti | Jerry Leavy | 1 |
| Neil Pearson | Tom Peel | 1 |
| Andrey Smolyakov | Oblov | 1 |
| Dmitriy Shevchenko | Andrei | 1 |
| Brian Hall | George | 1 |
| Anna Cropper | Mrs. Mortimer | 1 |
| Stephanie Cole | Dame Lettie Colston | 1 |
| Aimée Delamain | Ambulatory Grannie | 1 |
| Huckleberry Fox | Joe | 1 |
| Harry Landis | Kaufman | 1 |
| Tim Barlow | Old Man | 1 |
| Jenifer Landor | Jo McLoughlin | 1 |
| Tony Rohr | Parkhurst Prisoner | 1 |
| Michael Lees | John Harvey | 1 |
| Philip Bird | James Morland | 1 |
| Fabia Drake | Mrs Blake | 1 |
| Maggie Ollerenshaw | Courier | 1 |
| John Warnaby | OTT Man | 1 |
| Olga Vilner | Lena | 1 |
| Nikolay Dik | New Cop | 1 |
| Tariq Yunus | Balam | 1 |
| Sara Kestelman | Queenie Leavis | 1 |
| Graham McGrath | Paul Blake | 1 |
| Alan Curtis | Lord Mallory | 1 |
| Aleksey Poluyan | Sacha | 1 |
| Charlotte Coleman | Helen Bardsley | 1 |
| Patsy Rowlands | Daisy Harty | 1 |
| Lorraine Pilkington | Eileen O'Neill | 1 |
| William McBain | Frank | 1 |
| Neville Phillips | Coroner | 1 |