Directed by
| Alan Bridges | ||
Writing Credits
| Roger Marshall | ... | (screenplay) |
| Robert Holmes | ... | (from an original story) |
| Phyllis Spreadbury | ... | (collaborator on screenplay) (uncredited) |
| Phyllis Spreadbury | ... | (collaborator on storyline) (uncredited) |
Cast (in credits order)
| Edward Judd | ... | Mike Vernon | |
| Yôko Tani | ... | Leader of the Lystrians (as Yoko Tani) | |
| Valerie Gearon | ... | Claire Harland | |
| Lyndon Brook | ... | Carter | |
| Ric Young | ... | The Lystrian (as Eric Young) | |
| Tsai Chin | ... | Nurse Lim | |
| Barrie Ingham | ... | Major Muncaster | |
| Anthony Sharp | ... | Blackburn | |
| Glyn Houston | ... | Police Sergeant Draycott | |
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Ann Castle | ... | Sister Evans |
| John Tate | ... | Dundy | |
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Jean Lodge | ... | Barbara Gough |
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Ann Martin | ... | Sister Kelly |
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Tony Wall | ... | Ted |
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Peter Thomas | ... | Harry |
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Cali Raia | ... | Lystrian Woman |
| Mark Kingston | ... | Morgan | |
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Emrys Leyshon | ... | Sergeant Williams |
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Leonard Cracknell | ... | Lloyd |
| Stephanie Bidmead | ... | Elaine | |
| Norman Mitchell | ... | Lorry Driver | |
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Peter Sinclair | ... | Old Joe |
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Diane Aubrey | ... | Telephone Operator |
Produced by
| Jack Greenwood | ... | producer |
Music by
| Bernard Ebbinghouse | ||
Cinematography by
| James Wilson | ... | director of photography |
Editing by
| Derek Holding | ||
Casting By
| Ronnie Curtis | ... | (as Ronald Curtis) |
Art Direction by
| Scott MacGregor | ... | (as Scott MacGreggor) |
Makeup Department
| Jean Bear | ... | hairdresser |
| Benny Royston | ... | makeup artist |
Production Management
| Laurie Greenwood | ... | production manager |
Second Unit Director or Assistant Director
| Ted Lewis | ... | assistant director |
| Ray Atcheler | ... | third assistant director (uncredited) |
| Ron Purdie | ... | second assistant director (uncredited) |
Art Department
| Thomas Goswell | ... | assistant art director (uncredited) |
| Alan Roderick-Jones | ... | draughtsman (uncredited) |
| Gilbert Wood | ... | scenic artist (uncredited) |
Sound Department
| Brian Blamey | ... | sound editor |
| Red Law | ... | sound recordist |
| Roy Norman | ... | sound editor |
| Sidney Rider | ... | sound recordist |
| Harold Cox | ... | sound camera operator (uncredited) |
| Gordon Everett | ... | dubbing crew (uncredited) |
| Paul Lecker | ... | sound assistant (uncredited) |
| Tom Otter | ... | boom operator (uncredited) |
Special Effects by
| Jack Kine | ... | special effects |
| Stan Shields | ... | special effects |
| Ronnie Whitehouse | ... | special effects |
Camera and Electrical Department
| Peter Allwork | ... | camera operator |
| Gerry Elliott | ... | focus puller (uncredited) |
| Mike Evans | ... | clapper loader (uncredited) |
| Eddie Orton | ... | still photographer (uncredited) |
Costume and Wardrobe Department
| Eileen Welch | ... | wardrobe |
Editorial Department
| Tony Bray | ... | assistant editor (uncredited) |
Script and Continuity Department
| Marjorie Owens | ... | continuity |
Additional Crew
| Nat Cohen | ... | presenter: implied |
| Stuart Levy | ... | presenter: implied |
| Angela Dawson | ... | production secretary (uncredited) |
