Directed by
| Burt Balaban | ||
Writing Credits
| Hans Jacoby | ... | (screenplay) |
| Desmond Leslie | ... | (story) |
Cast (in credits order) verified as complete
| Patricia Neal | ... | Susan North | |
| Helmut Dantine | ... | The Stranger | |
| Derek Bond | ... | Arthur Walker | |
| Cyril Luckham | ... | Dr. Meinard | |
| Willoughby Gray | ... | Tom | |
 |
Marigold Russell | ... | Gretchen |
| Arthur Young | ... | Scientist | |
|
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Kenneth Edwards | ... | Charles Dixon |
| David Garth | ... | First Police Officer | |
|
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Stanley Van Beers | ... | General |
| Nigel Green | ... | Second Police Officer | |
|
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Graham Stuart | ... | Police Chief |
| Rest of cast listed alphabetically: | |||
| Jack Gwillim | ... | Representative of Parliament (uncredited) | |
| John Le Mesurier | ... | Man at Desk (uncredited) | |
| Peter Sallis | ... | Soldier (uncredited) | |
Produced by
| Burt Balaban | ... | producer |
| Gene Martel | ... | producer |
| Roy Rich | ... | associate producer |
Music by
| Eric Spear | ||
Cinematography by
| Kenneth Talbot | ||
Editing by
| Peter R. Hunt | ... | (as Peter Hunt) |
Art Direction by
| John Elphick | ||
Makeup Department
| Barbara Ritchie | ... | hairdresser |
| Nell Taylor | ... | makeup artist (as Nel Taylor) |
Production Management
| George R. Busby | ... | supervising production manager (as George Busby) |
Second Unit Director or Assistant Director
| Barry Delmaine | ... | assistant director |
| Alf Keating | ... | second assistant director (uncredited) |
Art Department
| Alec Gray | ... | draughtsman (uncredited) |
| Peter Russell | ... | draughtsman (uncredited) |
Sound Department
| John Cape | ... | sound |
| David Bower | ... | boom operator (uncredited) |
| William Germain | ... | sound maintenance (uncredited) |
| J.B. Smith | ... | dubbing crew (uncredited) |
| N.T. Stephenson | ... | boom assistant (uncredited) |
| Alfred Wilson | ... | dubbing editor (uncredited) |
Camera and Electrical Department
| Robert Walker | ... | camera operator (as Bob Walker) |
| Adrian Console | ... | clapper loader (uncredited) |
| Alan McCabe | ... | focus puller (uncredited) |
| Ricky Smith | ... | still photographer (uncredited) |
Costume and Wardrobe Department
| Laura Nightingale | ... | wardrobe |
Editorial Department
| Pat Holmes | ... | second assistant editor (uncredited) |
| Desmond Saunders | ... | first assistant editor (uncredited) |
Script and Continuity Department
| Tilly Day | ... | continuity |
