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Terence Longdon as Mark Robert Kingston |
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Donald Gray as Inspector Wills |
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Diane Clare as Mary Johnson |
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Robertson Hare as Ronald Fortescue |
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Dermot Walsh as Prof. Henry Taylor |
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Jill Hyem as Joy Clark |
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Felicity Young as Jill |
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Douglas Muir as Detective Sergeant Willoughby |
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Edwin Styles as Sir Lionel |
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Tony Thawnton as College Tutor |
| Writing | Michael Winner | Screenplay |
| Directing | Michael Winner | Director |
| Camera | Hugh Davey | Camera Operator |
