| Name | Character | Episodes |
|---|---|---|
| James Cosmo | 45 | |
| Bryan Marshall | 45 | |
| Robert Morris | 45 | |
| Norman Eshley | 45 | |
| Don Henderson | 45 | |
| John Lee | 45 | |
| David Savile | 45 | |
| Derek Godfrey | Capt. Edward Holt | 13 |
| Nigel Humphreys | 4 | |
| Peter Cellier | 2 | |
| John Ringham | 2 | |
| Philip Bond | 2 | |
| Michael Culver | 2 | |
| Geoffrey Toone | 2 | |
| John Rhys-Davies | 1 | |
| Colin McCormack | 1 | |
| Bernard Kay | 1 | |
| Ian McNeice | 1 | |
| Burt Kwouk | 1 | |
| Lewis Collins | 1 | |
| Peter Davison | 1 | |
| Patrick Troughton | 1 | |
| Leslie Schofield | 1 | |
| John Savident | 1 | |
| Ed Bishop | 1 | |
| John Castle | 1 | |
| Isla Blair | 1 | |
| Bernard Lee | 1 | |
| Maurice Roëves | 1 | |
| Denis Lill | 1 | |
| David Prowse | 1 | |
| Malcolm Terris | 1 | |
| Frederick Jaeger | 1 | |
| Julian Holloway | 1 | |
| Mark Eden | 1 | |
| William Lucas | 1 | |
| Ronald Leigh-Hunt | 1 | |
| Ivor Roberts | 1 | |
| Arnold Diamond | 1 | |
| Richard Leech | 1 | |
| Anthony Ainley | 1 | |
| Clifford Rose | 1 | |
| Roy Boyd | 1 | |
| Morris Perry | 1 | |
| David Daker | 1 | |
| Mary Tamm | 1 | |
| John Quarmby | 1 | |
| Prentis Hancock | 1 | |
| Kevin Stoney | 1 |