| Name | Character | Episodes |
|---|---|---|
| Terence Bayler | 23 | |
| John Hallam | 23 | |
| Christopher Cazenove | 23 | |
| Richard Hurndall | 23 | |
| Michael Brennan | 23 | |
| Denis Lill | 17 | |
| Michael Elwyn | 7 | |
| David Troughton | 2 | |
| Bill Stewart | 2 | |
| Susan Penhaligon | 1 | |
| Sheila Allen | 1 | |
| Anthony Sharp | 1 | |
| Simon Williams | 1 | |
| Norman Eshley | 1 | |
| Christopher Neame | 1 | |
| Saeed Jaffrey | 1 | |
| Isla Blair | 1 | |
| Peter Cellier | 1 | |
| Tim Pigott-Smith | 1 | |
| Brian Glover | 1 | |
| Paul Antrim | 1 | |
| Struan Rodger | 1 | |
| Paul Young | 1 | |
| Philip Madoc | 1 | |
| Derek Martin | 1 | |
| John Nightingale | 1 | |
| Sheila Keith | 1 | |
| Roy Boyd | 1 | |
| John Cunningham | 1 | |
| Melvyn Hayes | 1 | |
| Peter Copley | 1 | |
| Jo Kendall | 1 | |
| Timothy Carlton | 1 | |
| Sean Caffrey | 1 | |
| Marc Zuber | 1 | |
| John Malcolm | Dr. Jameson | 1 |
| Albert Moses | 1 | |
| Brian Worth | 1 | |
| Bruno Barnabe | 1 | |
| Robert Fyfe | 1 | |
| Elaine Donnelly | 1 | |
| David Jackson | 1 | |
| Zohra Sehgal | 1 | |
| Hugh Cross | 1 | |
| Jeremy Child | 1 |