| Person: | Characters | Episodes | |
| • Howard Lang | played | 12 Episodes | |
| • Milton Reid | played | 11 Episodes | |
| • Ewan Roberts | played | 7 Episodes | |
| • Roger Delgado | played | 6 Episodes | |
| • Peter Diamond | played | 4 Episodes | |
| • Patrick Troughton | played | 3 Episodes | |
| • William Lucas | played | 2 Episodes | |
| • Michael Ripper | played | 2 Episodes | |
| • Alex Scott (1) | played | 2 Episodes | |
| • Katherine Woodville | played | 2 Episodes | |
| • Richard Warner | played | 2 Episodes | |
| • Eve Lucett | played | 2 Episodes |