cast
- Jean Lodge
- Barbara Gough
- Glyn Houston
- Sgt. Draycott
- Peter Sinclair
- Old Joe
- Valeiie Gearon
- Dr. Claire Harland
- Yoko Tani
- Lystrian Leader
- Tsai Chin
- Nurse Lim
- Barrie Ingham
- Maj. Muncaster
- Eric Young
- Lystrian Man
- Lyndon Brook
- Brian Carter
- Anthony Sharp
- Lawrence Blackburn
- Edward Judd
- Dr. Vernon
crew
- Alan Bridges
- Director
- Jack Greenwood
- Producer
- Robert Holmes
- Screen Story
- Roger Marshall
- Screenwriter
- James Wilson
- Cinematographer
- Bernard Ebbinghouse
- Composer (Music Score)
- Derek Holding
- Editor
- Jack Kline
- Special Effects
- Ronnie Whitehouse
- Special Effects
- Stan Shields
- Special Effects
