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Robert Young as Dr. Marcus Welby |
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Alexis Smith as Tessa Menard |
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Delphine Forest as Anna Dupuy |
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Craig Stevens as Frank Poston |
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Robert Hardy as Dr. Price |
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Betsy Blair as Grace Simpson |
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Robert MacLeod as Allen Simpson |
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Paul Maxwell as Dr. Wallace |
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Jean-Pierre Leclerc as Dr. Marcel |
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Pauline Larrieu as CeCe |
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Daniel Léger as French Hotel Clerk |
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Anna Gaylot as Housekeeper |
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Mary Martlew as Ruth Wilson |
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Alain Klarer as French Doctor |
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Douglas Hudkins as Chef |
| Directing | Steve Gethers | Director |
| Editing | Melvin Shapiro | Editor |
| Art | Franz Maurer | Art Direction |
| Production | Howard P. Alston | Producer |
| Production | Martin Starger | Executive Producer |
| Camera | Hans Liechti | Director of Photography |
| Art | Gérard Viard | Art Direction |
| Writing | Steve Gethers | Writer |
| Production | Peter-Christian Fueter | Producer |
| Sound | Georges Garvarentz | Music |
| Editing | David Byron Lloyd | Editor |
