Directed by
| Bill Hays | ||
Writing Credits (in alphabetical order)
| William Emms | ... | (writer) |
Cast (in credits order)
 |
John Robinson | ... | Sir Michael Gerrard |
| Oliver Reed | ... | Dr. Richard Franklin | |
|
|
Michael Hawkins | ... | Philip Boult |
| Muriel Pavlow | ... | Sarah Randall | |
| Lyndon Brook | ... | Dr. Randall | |
|
|
Nicolette Bernard | ... | Valentina Kubishev |
| Donald Pickering | ... | Watkins | |
| Rest of cast listed alphabetically: | |||
|
|
David Charlesworth | ... | 2nd Security Man |
|
|
Brigit Forsyth | ... | Secretary |
|
|
Dickie Martyn | ... | 1st Security Man |
| Warren Stanhope | ... | American Scientist | |
Produced by
| John Robins | ... | producer |
Music by
| Ken Thorne | ||
Editing by
| Angus Newton | ||
Production Design by
| Donald Brewer | ||
Camera and Electrical Department
| Charles Beddous | ... | film cameraman |
Music Department
| Albert Elms | ... | composer: incidental music |
Script and Continuity Department
| Ken Levison | ... | script editor |
Additional Crew
| Jim Coburn | ... | series researcher |