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Peter Lawford as Ellery Queen |
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Harry Morgan as Insp. Richard Queen |
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E.G. Marshall as Dr. Cazalis |
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Skye Aubrey as Christy |
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Stefanie Powers as Celeste |
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Coleen Gray as Mrs. Cazalis |
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Morgan Sterne as Police Commissioner |
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Bill Zuckert as Sgt. Velie |
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Bob Hastings as Hal Hunter |
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Than Wyenn as Registrar |
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Buddy Lester as Policeman |
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William Lucking as Lt. Summers |
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Pat Delaney as Miss Price |
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Billy Sands as Adrian Abbott |
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Tim Herbert as |
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Robin Raymond as |
| Production | Edward Montagne | Executive Producer |
| Writing | Ted Leighton | Teleplay |
| Production | Leonard J. Ackerman | Producer |
| Editing | Sam E. Waxman | Editor |
| Art | Alexander A. Mayer | Art Direction |
| Camera | William Margulies | Director of Photography |
| Sound | Jerry Fielding | Original Music Composer |
| Writing | Frederic Dannay | Novel |
| Writing | Richard Levinson | Writer |
| Directing | Barry Shear | Director |
| Writing | Manfred Lee | Novel |
| Writing | William Link | Writer |
| Art | Robert C. Bradfield | Set Decoration |
