 | Lynette Davies | Davinia Prince 26 episodes, 1977-1978 |
 | John Barron | Sir Clive Farmer 26 episodes, 1977-1978 |
 | Geoffrey Whitehead | Ronnie Bartlett 25 episodes, 1977-1978 |
 | Patsy Kensit | Emma Prince 24 episodes, 1977-1978 |
 | William Gaunt | Gareth Brown 22 episodes, 1977-1978 |
| | Helen Cleaves | Gwynneth 21 episodes, 1977-1978 |
 | Peter Copley | Dr. Richard Montagu 21 episodes, 1977-1978 |
| | Ellis Dale | Geoffrey Tatum 21 episodes, 1977-1978 |
| | Andrew Dove | Paul Prince 20 episodes, 1977-1978 |
 | Gerald Sim | Terry Bickles 16 episodes, 1977-1978 |
| | Anthea Holloway | Annie 15 episodes, 1977-1978 |
| | Janet Spencer-Turner | Patricia Wyatt 15 episodes, 1978 |
 | Bernard Lee | Eddie Prince 13 episodes, 1977-1978 |
 | Michael Craig | Tom Pearson 11 episodes, 1978 |
 | Fulton Mackay | Sam Wyatt 8 episodes, 1978 |
| | Mark McManus | Bill Wood 7 episodes, 1978 |
| | Christine Schofield | Charlotte 6 episodes, 1977-1978 |
| | Rosemary Williams | Carole Baxter 5 episodes, 1978 |
 | Nicky Henson | Douggie Taylor 4 episodes, 1977 |
| | June Ellis | Mary Francis 3 episodes, 1977 |
 | Sandor Elès | Philippe de Vries 3 episodes, 1977 |
| | Pat Heywood | Katherine Leaver 3 episodes, 1977 |
| | Jane How | Joan Russell 3 episodes, 1977 |
| | James Berwick | Henry Curzon 3 episodes, 1978 |
| | John Carlin | George Briscoe 3 episodes, 1978 |
| | Juliette James | Receptionist 3 episodes, 1978 |
| | Desmond Jordan | Forrester 3 episodes, 1978 |
 | Neville Phillips | Barman 3 episodes, 1978 |
 | Michael Sheard | Bobby Anderson 2 episodes, 1977 |
| | Rosemary Miller | Mrs. Lynch 2 episodes, 1978 |
| | Joy Stewart | Maggie Klevic 2 episodes, 1978 |
 | Keith Barron | Don Prince 1 episode, 1977 |
 | Edwin Brown | Ambulance driver 1 episode, 1977 |
| | Holly De Jong | Receptionist 1 episode, 1977 |
| | Jacqueline Delhaye | Judy 1 episode, 1977 |
| | Sharon Duce | Mrs. Sherwood 1 episode, 1977 |
| | Sue Elgin | Night nurse 1 episode, 1977 |
 | Bella Emberg | Traffic warden 1 episode, 1977 |
| | Lilian Grassom | Receptionist 1 episode, 1977 |
| | Carol Hazell | Day nurse 1 episode, 1977 |
 | Milton Johns | Bill Henderson 1 episode, 1977 |
 | John Leeson | Brian Harman 1 episode, 1977 |
| | Artro Morris | Wilf Gorman 1 episode, 1977 |
 | Wolfe Morris | Jan de Groot 1 episode, 1977 |
| | Monique Potter | Laura 1 episode, 1977 |
| | Graham Rowe | Senior registrar 1 episode, 1977 |
| | David Savile | Brian Little 1 episode, 1977 |
| | Nicholas Simons | Photographer 1 episode, 1977 |
| | Tracy Strand | Child 1 episode, 1977 |
| | Denise Vance | Reception nurse 1 episode, 1977 |
| | Harry Walker | Ambulance man 1 episode, 1977 |
| | Martin Wimbush | Priest 1 episode, 1977 |
| | James Appleby | Doorman 1 episode, 1978 |
| | Debbi Blythe | Gareth's secretary 1 episode, 1978 |
 | Frank Ellis | Roger 1 episode, 1978 |
| | Marion Fiddick | Rose 1 episode, 1978 |
| | David Freedman | Housebuyer 1 episode, 1978 |
| | Patrick French | Mr. Franklyn 1 episode, 1978 |
| | Tom Garratt | Fletcher 1 episode, 1978 |
 | Willoughby Gray | Sir Nigel Thorson 1 episode, 1978 |
| | Gordon Honeycombe | Interviewer 1 episode, 1978 |
| | Gerald James | Mr. Peters 1 episode, 1978 |
| | Frances Jeater | Jane Randell 1 episode, 1978 |
 | Gorden Kaye | Mr. Thrush 1 episode, 1978 |
 | Geoffrey Leesley | Greg Nicholls 1 episode, 1978 |
| | Annette Lynton | Housebuyer 1 episode, 1978 |
 | John Scott Martin | Porter 1 episode, 1978 |
| | Jacqueline Maude | Bank secretary 1 episode, 1978 |
| | Fernand Monast | Head waiter 1 episode, 1978 |
| | Dicon Murray | Boy 1 episode, 1978 |
 | Nadim Sawalha | Muhammed Yateen 1 episode, 1978 |
| | Christine Shaw | Mary 1 episode, 1978 |
 | Oliver Smith | Van driver 1 episode, 1978 |
| | Michael Stainton | Foreman 1 episode, 1978 |
| | Raymond Witch | Don Masters 1 episode, 1978 |
