| Name | Character | Episodes |
|---|---|---|
| Bernard Kay | Negrini | 2 |
| Kenneth Cope | Bill Lane | 2 |
| Frances White | Melanie Langdon | 2 |
| Donald Sutherland | Switchboard Operator | 1 |
| Joseph Fürst | Doctor Korczak | 1 |
| Jerome Willis | Dr. Blundell | 1 |
| Jerome Willis | Captain Gladman | 1 |
| Keith Barron | Peltz | 1 |
| Andrew Keir | Winstanley | 1 |
| Mark Burns | Marston | 1 |
| Tony Garnett | 1 | |
| Frank Finlay | Fernand Destayac | 1 |
| Walter Gotell | Gestapo Commissar Kehr | 1 |
| Anton Diffring | 1 | |
| Johnny Sekka | Moses | 1 |
| Leonard Rossiter | Gerard Moustier | 1 |
| Denise Coffey | Lizzie | 1 |
| John Ringham | Colonel Rich | 1 |
| Michael Robbins | Humphrey Place | 1 |
| David Spenser | Trevor Lomas | 1 |
| David Spenser | Robert Coster | 1 |
| David Spenser | Charles Robinson | 1 |
| Patricia Haines | Sarah Freeman | 1 |
| Peter Illing | Max Eisenstein | 1 |
| Margaretta Scott | Lady Spencer | 1 |
| Richard Vernon | Mr. Endworthy | 1 |
| Derek Waring | Rollo | 1 |
| Pauline Yates | Maryse Destayac | 1 |
| Barry Warren | Arthur | 1 |
| Alan Tilvern | Andreas | 1 |
| Robert Arden | George Spencer | 1 |
| Michael Culver | Mr. Charters | 1 |
| Hana Maria Pravda | Else Schulse | 1 |
| Hana Maria Pravda | Anna | 1 |
| John Woodnutt | Labour Front Leader Baumer | 1 |
| John Woodnutt | Parson Platt | 1 |
| Noel Dyson | Dorrie Robinson | 1 |
| Mandy Miller | Joan Robinson | 1 |
| Laurence Payne | Larsen | 1 |
| Albert Lieven | 1 | |
| John Abineri | Colonel Hartrep | 1 |
| Leonard Fenton | Police Superintendent | 1 |
| Margaret Whiting | Elena | 1 |
| Patrick Garland | Opie | 1 |
| Simon Prebble | 1 | |
| Peter Birrel | Carleton Myatt | 1 |