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John Saxon as Dr. Jack Costain |
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Patricia Haines as Ann Barlow |
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Alfred Burke as Detective Supt. Hartley |
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Maurice Denham as Dr. Morley |
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John Carson as The Major |
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Ballard Berkeley as Cmdr. Savage |
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Stanley Meadows as Det. Tom Grant |
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Barbara French as Joyce Malone |
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Robert Crewdson as Medra |
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Aubrey Morris as Thorburn |
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Jack Watson as The Sergeant |
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Tony Wager as Pvt. Higgins |
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David Gregory as Pvt. Jones |
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Marianne Stone as Madge Lilburn |
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Warren Mitchell as Reg Lilburn |
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Geoffrey Lumsden as Col. Davy |
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Douglas Livingstone as 2nd R / T soldier |
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Tom Gill as Police Commissioner's secretary |
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Vincent Harding as First R/T Soldier |
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Romo Garrara as Lieutenant |
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John Sherlock as TV Newscaster |
| Writing | Frank Crisp | Novel |
| Directing | John Gilling | Director |
| Writing | Jim O'Connolly | Screenplay |
| Editing | Philip Barnikel | Editor |
| Camera | Stephen Dade | Director of Photography |
| Costume & Make-Up | Joyce James | Hairstylist |
| Sound | Johnny Gregory | Original Music Composer |
| Production | John I. Phillips | Executive Producer |
| Costume & Make-Up | Bunty Phillips | Makeup Artist |
| Production | Ronald Liles | Producer |
| Art | Harry White | Art Direction |
| Sound | Barbara Hopkins | Sound |
