 | Deryck Guyler | Norman Potter 55 episodes, 1968-1972 |
 | Noel Howlett | Mr. Cromwell 55 episodes, 1968-1972 |
 | Joan Sanderson | Doris Ewell 55 episodes, 1968-1972 |
 | Richard Davies | Mr. Price 55 episodes, 1968-1972 |
 | Erik Chitty | Mr. Smith 55 episodes, 1968-1972 |
| | Liz Gebhardt | Maureen Bullock 37 episodes, 1968-1971 |
 | John Alderton | Bernard Hedges 36 episodes, 1968-1971 |
| | Peter Cleall | Eric Duffy 36 episodes, 1968-1971 |
| | David Barry | Frankie Abbott 35 episodes, 1968-1971 |
| | Peter Denyer | Dennis Dunstable 35 episodes, 1968-1971 |
| | Penny Spencer | Sharon Eversleigh 34 episodes, 1968-1970 |
| | Malcolm McFee | Peter Craven 34 episodes, 1968-1970 |
| | Gregory Scott | Mr. Wyatt 1 episode, 1969-1972 |
| | Charles Bolton | Godber / ... 13 episodes, 1971-1972 |
| | Jill Kerman | Penny Wheeler / ... 12 episodes, 1970-1971 |
| | Rosemary Faith | Daisy 12 episodes, 1971-1972 |
| | Billy Hamon | Des 12 episodes, 1971-1972 |
 | Barry McCarthy | Terry Stringer 12 episodes, 1971-1972 |
| | Drina Pavlovic | Celia 12 episodes, 1971-1972 |
 | Clive Moss | Steele 1 episode, 1971-1972 |
 | Bernard Holley | Mr. Hurst 8 episodes, 1971-1972 |
 | Vivienne Martin | Miss Petting 8 episodes, 1971-1972 |
 | Richard Warwick | David Ffitchett-Brown 7 episodes, 1971 |
| | David Howe | Colin Lovelace / ... 6 episodes, 1970-1971 |
| | Lindsay Campbell | Mr. Sibley 5 episodes, 1970-1972 |
| | Arnold Peters | School Governor 4 episodes, 1968-1972 |
| | Shirley Cheriton | Pat 3 episodes, 1971 |
| | Roderick Smith | Philip Larch 3 episodes, 1971 |
 | Susan Richards | Madge Smith 2 episodes, 1970 |
 | Bob Todd | Boating Lake Attendant / ... 2 episodes, 1968-1970 |
| | Ann Lancaster | Mrs. Pearce 2 episodes, 1968 |
 | Alister Williamson | Mr. Duffy 2 episodes, 1968 |
| | Barbara Mitchell | Mrs. Abbott 2 episodes, 1969-1970 |
| | Joe Ritchie | Mr. Stone / ... 2 episodes, 1970-1971 |
 | Glynn Edwards | Mr. Dix 2 episodes, 1971 |
| | Brinsley Forde | Herman 2 episodes, 1971 |
| | Linda Jolliff | Elizabeth 2 episodes, 1971 |
| | Jeffrey Gardiner | Hotel Receptionist 1 episode, 1970 |
| | Tony Alleff | Niklos' Sidekick 1 episode, 1968 |
| | James Beattie | Barman 1 episode, 1968 |
| | Fred Beauman | Uncle Niklos 1 episode, 1968 |
| | Winifred Braemar | Mrs. Armitage 1 episode, 1968 |
| | Michael Burrell | Mr. Dowling 1 episode, 1968 |
| | Roger Carey | Abapellogopholis 1 episode, 1968 |
| | Gay Hamilton | Ann Collins 1 episode, 1968 |
| | Michael Holden | Graham Webster 1 episode, 1968 |
| | Alan Mason | Fireman 1 episode, 1968 |
| | Allan McClelland | Mr. Bullock 1 episode, 1968 |
| | Ian Ramsey | Jewish pupil 1 episode, 1968 |
| | Eunice Black | Maud 1 episode, 1969 |
| | Syd Conabere | Fred 1 episode, 1969 |
| | Patrick Connor | 1 episode, 1969 |
| | Diana Coupland | Connie Eversleigh 1 episode, 1969 |
| | Jay Denyer | The Policeman 1 episode, 1969 |
| | Terry Duggan | Harry 1 episode, 1969 |
 | Suzan Farmer | Judith Howard 1 episode, 1969 |
| | George Georghiou | Panalal 1 episode, 1969 |
| | Ian Gray | Head waiter 1 episode, 1969 |
| | Wilfred Grove | 1 episode, 1969 |
 | Geoffrey Hughes | Mr. Turner 1 episode, 1969 |
 | Tom Marshall | Yob in cafe 1 episode, 1969 |
| | Mollie Maureen | Mrs. Wilmot 1 episode, 1969 |
| | Olive Mercer | Mrs. Quimby 1 episode, 1969 |
 | John Nettleton | Police Sergeant 1 episode, 1969 |
| | Pat Nye | Mrs. Savage 1 episode, 1969 |
 | Roy Patrick | Off-Licence Owner 1 episode, 1969 |
| | Jo Rowbottom | Elsie 1 episode, 1969 |
| | Claire Shenstone | The Waitress 1 episode, 1969 |
| | Merlin Ward | Palmer 1 episode, 1969 |
 | Neil Wilson | The Bookmaker 1 episode, 1969 |
| | Jack Woolgar | Albert Dearth 1 episode, 1969 |
 | Terence Alexander | Mr. Kelp 1 episode, 1970 |
 | Peter Bayliss | Mr. Dunstable 1 episode, 1970 |
| | Michael Burroughs | Alan - Man waiting for interview 1 episode, 1970 |
 | Richard Caldicot | Mr. Herman 1 episode, 1970 |
 | Julian Chagrin | Courtney 1 episode, 1970 |
 | Janina Faye | Hermione 1 episode, 1970 |
 | Barrie Gosney | Clark 1 episode, 1970 |
| | Lucy Griffiths | Patient 1 episode, 1970 |
| | Betty Hare | Landlady 1 episode, 1970 |
| | Suzanne Heath | The Secretary 1 episode, 1970 |
 | Peter Mackriel | Doctor 1 episode, 1970 |
| | Roland MacLeod | Monsignor Sopwith 1 episode, 1970 |
 | Derek Murcott | Conservative 1 episode, 1970 |
| | Harry Shacklock | Chess player 1 episode, 1970 |
| | Campbell Singer | Recruiting Sgt. 'Banger' King 1 episode, 1970 |
| | Leslie Weeks | Ticket collector 1 episode, 1970 |
 | Robin Askwith | Eddie 1 episode, 1971 |
| | Roger Avon | Bert 1 episode, 1971 |
 | Tim Barrett | Mr. Bell 1 episode, 1971 |
 | Timothy Bateson | Dutton 1 episode, 1971 |
| | Stanley Beard | Mr. Roberts 1 episode, 1971 |
 | James Bree | Mr. Barratt 1 episode, 1971 |
 | Edward Brooks | CID man 1 episode, 1971 |
| | Zena Clifton | Jackie 1 episode, 1971 |
| | Colin Daniels | Slater 1 episode, 1971 |
 | Elaine Donnelly | Trisha 1 episode, 1971 |
 | Denis Gilmore | Snatch 1 episode, 1971 |
 | Joe Gladwin | Chalky 1 episode, 1971 |
| | Harold Goldblatt | Mr. Abselom 1 episode, 1971 |
| | Derek Griffiths | Sidney Noakes 1 episode, 1971 |
| | Carol Hawkins | Sharon Eversleigh 1 episode, 1971 |
| | Nicholas Hoye | Talbot 1 episode, 1971 |
| | Babs Jessup | Ruthie 1 episode, 1971 |
| | Diana King | Mrs. Grey 1 episode, 1971 |
| | Ian Lane | Podge 1 episode, 1971 |
| | Arthur Lovegrove | Harry 1 episode, 1971 |
 | Jeanne Mockford | Mrs. Duffy 1 episode, 1971 |
| | Kevin Moody | Gerald Davis 1 episode, 1971 |
| | Richard Mottau | Kevin Duffy 1 episode, 1971 |
| | Colin Pilditch | Boz 1 episode, 1971 |
 | Wendy Richard | Rita 1 episode, 1971 |
 | Cyril Shaps | Leonard Larch 1 episode, 1971 |
| | Martin Skinner | Freaky 1 episode, 1971 |
| | David Spooner | Unnamed blond boy 1 episode, 1971 |
 | Barry Stokes | PC Riordan 1 episode, 1971 |
 | Mollie Sugden | Alice Larch 1 episode, 1971 |
| | Madoline Thomas | Mrs. Ewell 1 episode, 1971 |
| | Kenneth Thornett | Sergeant 1 episode, 1971 |
 | Leon Vitali | Peter Craven 1 episode, 1971 |
| | Kate Williams | Mrs. Davis 1 episode, 1971 |
| | Anita Carey | Air hostess 1 episode, 1972 |
| | Charleine | Stripper 1 episode, 1972 |
| | Geoffrey Cheshire | Barman 1 episode, 1972 |
| | Joan Geary | Mrs. Stringer 1 episode, 1972 |
| | Valerie Georgeson | Ground stewardess 1 episode, 1972 |
 | Paddy Joyce | Mahon 1 episode, 1972 |
| | Frank Littlewood | Man 1 episode, 1972 |
| | Madeleine Mills | Miss Nately 1 episode, 1972 |
| | Declan Mulholland | Flann 1 episode, 1972 |
 | John Owens | Police Constable 1 episode, 1972 |
 | John Sharp | Police Inspector 1 episode, 1972 |
| | Richard Shaw | Mr. Stringer 1 episode, 1972 |
 | Jack Watson | Barker 1 episode, 1972 |
 | Lockwood West | Sir Giles Hardwicke 1 episode, 1972 |
| | Tina Heath | Pupil / ... (uncredited) unknown episodes |
| | Kristin Hatfield | 2nd Girl (uncredited) unknown episodes |
| | Jenny Irvine | 1st Girl (uncredited) unknown episodes |
| | Winifred Sabine | Woman in park (uncredited) unknown episodes |
| | Bert Palmer | Stationmaster (uncredited) unknown episodes |
| | Barbie Denham | School Girl (uncredited) unknown episodes |
