 | John Alderton | Reginald Mulliner / ... 20 episodes, 1975-1978 |
 | Pauline Collins | Agnes Flack / ... 13 episodes, 1975-1976 |
 | P.G. Wodehouse | Narrator / ... 2 episodes, 1975 |
| | Paul McDowell | First Cop / ... 3 episodes, 1975-1978 |
| | Sydney Tafler | I.Q. Fishbein / ... 2 episodes, 1975-1976 |
 | David Healy | Bellhop - Raymond Bunion / ... 2 episodes, 1976-1978 |
| | David Quilter | Tuppy Glossop 2 episodes, 1976-1978 |
 | Anthony Sharp | Specialist 2 episodes, 1975-1978 |
 | Cyril Luckham | Bishop / ... 2 episodes, 1975-1978 |
| | Robert Prince | Bernard / ... 2 episodes, 1975 |
| | David Rowlands | Lord Knubble 2 episodes, 1978 |
| | William Mervyn | Mr. Mulliner / ... 2 episodes, 1974-1975 |
 | Julian Holloway | Archibald Mulliner / ... 2 episodes, 1974-1975 |
| | Michael Burrell | Waldo Winkler 1 episode, 1975 |
 | Alan MacNaughtan | J.H. Potter 1 episode, 1976 |
| | Therese McMurray | Poppy Tremayne 1 episode, 1975 |
| | Anna Wing | Mrs. Barnaby 1 episode, 1975 |
 | Simon Williams | Sidney McMurdo 1 episode, 1976 |
| | Judy Buxton | Lady Millicent Shipton-Bellinger 1 episode, 1978 |
 | Richard Caldicot | Angus McWhirter 1 episode, 1978 |
| | Anna Fox | April Carroway 1 episode, 1978 |
| | Derek Francis | Sir Jethro Mott 1 episode, 1978 |
| | Susan Jameson | Bella Mae Jobson 1 episode, 1978 |
| | Leslie Sands | The Earl of Wivelscombe 1 episode, 1978 |
 | Ballard Berkeley | Sir Alexander 1 episode, 1975 |
| | Andrew Downie | Gerald McLaren 1 episode, 1975 |
| | Marcia King | Receptionist 1 episode, 1975 |
 | Gabrielle Drake | Aurelia Cammarleigh 1 episode, 1976 |
 | Joan Sanderson | Lady Bassett 1 episode, 1976 |
 | Thorley Walters | Sir Leopold Jellaby 1 episode, 1976 |
 | Bernard Archard | Purkiss 1 episode, 1978 |
 | John Barron | Reverend Stanley Brandon 1 episode, 1978 |
| | Robert Dorning | Lord Brangbolton 1 episode, 1978 |
 | Liza Goddard | Lady Geraldine Spettisbury 1 episode, 1978 |
| | Maggie Henderson | Amanda Biffen 1 episode, 1978 |
| | Tony Mathews | Captain Bradbury 1 episode, 1978 |
 | David Troughton | Carter Muldoon 1 episode, 1978 |
 | Shelagh Fraser | Lady Bassinger 1 episode, 1975 |
 | William Gaunt | Dr. Joe Mulliner 1 episode, 1975 |
 | Raymond Huntley | Sir Aylmer Bastable 1 episode, 1975 |
 | John Phillips | Sir Redvers Branksome 1 episode, 1975 |
 | Geoffrey Whitehead | Rodney Spelvin 1 episode, 1975 |
 | Margaret Courtenay | Lady Wickham 1 episode, 1976 |
| | Dorothy Frere | Theatre Barmaid 1 episode, 1976 |
 | Cyd Hayman | Cora McGuffy Spottsworth 1 episode, 1976 |
 | Desmond Llewelyn | Rev. Sidney Gooch 1 episode, 1976 |
| | Avis Bunnage | Mrs. Wardle 1 episode, 1978 |
 | Fulton Mackay | Mr. Widgery 1 episode, 1978 |
 | Sue Nicholls | Esme Rampling 1 episode, 1978 |
 | Gerald Sim | Vicar 1 episode, 1978 |
| | Bernadette Windsor | Prudence Carroway 1 episode, 1978 |
| | David Allister | Horatio Bassinger 1 episode, 1975 |
 | Phil Daniels | Office Boy 1 episode, 1975 |
 | Mark Dignam | Lord Rumbelow 1 episode, 1975 |
 | Daphne Heard | Nanny Wilks 1 episode, 1975 |
| | Billy John | Waiter 1 episode, 1975 |
 | Peter Jones | Ben F. Zizzbaum 1 episode, 1975 |
 | Patrick Newell | Fierce Man 1 episode, 1975 |
 | Timothy Carlton | Algy Crufts 1 episode, 1976 |
 | Jonathan Cecil | King Boola 1 episode, 1976 |
| | Jeannie Collings | Teashop Waitress 1 episode, 1976 |
 | Paul Curran | Joe Beamish 1 episode, 1976 |
 | Walter Gotell | Sir Rackstraw Cammarleigh 1 episode, 1976 |
| | David Shaw | Holidaymaker 1 episode, 1976 |
| | Belinda Carroll | Jane Brandon 1 episode, 1978 |
| | Terence Conoley | Jarvis 1 episode, 1978 |
| | Jane Cussons | Rosie Little 1 episode, 1978 |
 | Sally Lahee | Lady Carroway 1 episode, 1978 |
| | Sally Thomsett | Celia Todd 1 episode, 1978 |
 | Graham Armitage | Parkin 1 episode, 1975 |
| | Maggie Fitzgibbon | Helga Schnellenhamer 1 episode, 1975 |
| | Michael Kemp | Wilfred Bassinger 1 episode, 1975 |
| | Mike Lewin | Porter 1 episode, 1975 |
| | Artro Morris | Mr. Philbrick 1 episode, 1975 |
| | Ben Aris | Lester Mapledurham 1 episode, 1976 |
| | Hazel Bainbridge | Lady Mulliner 1 episode, 1976 |
 | Don Fellows | George Pybus 1 episode, 1976 |
| | Lucy Fenwick | Lulabelle Sprockett 1 episode, 1976 |
| | Laura Collins | Julia Prebble 1 episode, 1978 |
| | Damaris Hayman | Miss Frisby 1 episode, 1978 |
| | Anthony Howard | Sir Sutton Hartley-Wesping 1 episode, 1978 |
| | William Hoyland | Stilton Cheesewright 1 episode, 1978 |
| | Beatrix Mackey | Lady Bishopess 1 episode, 1978 |
 | Nicholas McArdle | Ted 1 episode, 1978 |
| | John Rudling | Butler - Gascoigne 1 episode, 1978 |
| | Leslie Dwyer | Joe Boffin 1 episode, 1975 |
 | Colin Jeavons | Stranger 1 episode, 1975 |
 | John Sharp | Colonel Pashley-Drake 1 episode, 1975 |
 | Josephine Tewson | Mabel Potts 1 episode, 1975 |
| | Harry Tierney | Hemingway, the Butler 1 episode, 1975 |
| | Vicki Woolf | Lottie Latour 1 episode, 1975 |
| | Gerald Case | Sir Mortimer Wingham 1 episode, 1976 |
| | Daphne Oxenford | Lady Cammarleigh 1 episode, 1976 |
| | Budemoor Yang-Tse Tong | Pekingese 1 episode, 1976 |
 | Arthur Cox | Sir Jasper Addleton 1 episode, 1978 |
| | Joan Harsant | Gladys 1 episode, 1978 |
| | Joe Iles | Mortuary Macabre 1 episode, 1978 |
 | Norman Mitchell | P.C. Popjoy 1 episode, 1978 |
| | William Moore | Butler 1 episode, 1978 |
| | Michael Logan | Benson 1 episode, 1975 |
 | Geraldine Newman | Lady on Train 1 episode, 1975 |
 | James Smillie | Police Sergeant 1 episode, 1975 |
| | Mary Barclay | Lady Wingham 1 episode, 1976 |
 | Kenneth Benda | Bagshot - Butler 1 episode, 1976 |
| | Richard Dennis | Writer 1 episode, 1976 |
| | Michael Bilton | Malay - Butler 1 episode, 1978 |
| | Michael Angrave | Mr. Simpson 1 episode, 1976 |
 | Angus MacInnes | Yes Man 1 episode, 1976 |
 | Peter Mackriel | Waiter 1 episode, 1976 |
| | Hugh Morton | Bishop 1 episode, 1978 |
 | Blain Fairman | Second Cop 1 episode, 1975 |
| | John Dunbar | Butler 1 episode, 1976 |
| | Jay Neill | Yes Man 1 episode, 1976 |
| | Barbara Bermel | Mother 1 episode, 1975 |
| | Elisabeth Day | Parlourmaid 1 episode, 1976 |
| | Roger Salter | Yes Man 1 episode, 1976 |
 | Susan Finch | Dancer 1 episode, 1975 |
| | Michael Dynan | Yes Man 1 episode, 1976 |
| | Dale Jackley | Dancer 1 episode, 1975 |
| | Wendy Gilmore | Baby's Mother 1 episode, 1976 |
| | Deirdre Laird | Dancer 1 episode, 1975 |
| | Bill Reimbold | Clergyman 1 episode, 1976 |
| | Susan Ritman | Dancer 1 episode, 1975 |
 | Joan Benham | Aunt Cora 1 episode, 1974 |
| | Irene Peters | Customer 1 episode, 1974 |
 | Madeline Smith | Aurelia Cammerleigh 1 episode, 1974 |
