| Name | Character | Episodes |
|---|---|---|
| Clifford Evans | 15 | |
| Ian Fleming | 2 | |
| Russell Napier | 2 | |
| Kenneth Haigh | 2 | |
| Patrick Jordan | 2 | |
| Tim Turner | 2 | |
| Eliot Makeham | 2 | |
| Peter Swanwick | 2 | |
| John Welsh | 1 | |
| Desmond Llewelyn | 1 | |
| Anthony Newley | 1 | |
| Billie Whitelaw | 1 | |
| Sebastian Cabot | 1 | |
| Walter Gotell | 1 | |
| Glyn Houston | 1 | |
| Ronald Adam | 1 | |
| Melvyn Hayes | 1 | |
| Cyril Chamberlain | 1 | |
| Gudrun Ure | 1 | |
| Marjorie Rhodes | 1 | |
| Dorothy Alison | 1 | |
| Esma Cannon | 1 |