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Judith Anderson as Elizabeth Devlin |
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Elizabeth Ashley as Sally Devlin |
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David McCallum as Kenneth Canfield |
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Mary Adams as The Maid |
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Barry Cahill as The Sergeant |
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Alan Caillou as The Police Inspector |
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Helmut Dantine as Hans Raedler |
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Gregory Gaye as The Soviet Ambassador |
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Larry Gelbman as The Manservant |
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Lew Horn as The Intruder |
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Peter Marland-Jones as Tichborne |
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Donald Moffat as John Heywood |
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Priscilla Morrill as Tatiana Kogan |
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Laurence Naismith as Lord Pomeroy |
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Charles H. Radilak as Lancome |
| Directing | George Schaefer | Director |
| Writing | Michael Dyne | Writer |
| Writing | Edward Essex | Writer |
| Costume & Make-Up | Ralph Gulko | Makeup Artist |
| Writing | Catherine Gaskin | Novel |
| Art | James Trittipo | Art Direction |
| Art | Jack Stewart | Assistant Art Director |
| Production | George Schaefer | Executive Producer |
| Costume & Make-Up | Noel Taylor | Costumer |
| Sound | Bernard Green | Original Music Composer |
| Production | Robert Hartung | Producer |
| Sound | Emil Neroda | Sound Mixer |