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Cliff Robertson as Christopher Ross / Arthur Selby |
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Dina Merrill as Brancie Hagen |
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Luther Adler as Imre Hyneck |
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Wilfrid Hyde-White as Morris Vanders |
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Lilia Skala as Dr. Novack |
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Antoinette Bower as Iris |
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Donald Sutherland as Benedeck |
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Szabó Sándor as Janosi |
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Clarke Gordon as Scopes |
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Woodrow Parfrey as Beamis |
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Victor Brandt as Tibor |
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Danny Klega as Guard |
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Charles H. Radilak as Reisling |
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Jill Curzon as Vander's Secretary |
| Art | Howard E. Johnson | Art Direction |
| Writing | John Kneubuhl | Writer |
| Writing | Gustave Field | Writer |
| Sound | Stanley Wilson | Music |
| Costume & Make-Up | Burton Miller | Costume Design |
| Directing | George Bisk | Assistant Director |
| Writing | Joel Rogosin | Writer |
| Production | Joel Rogosin | Producer |
| Camera | Gerald Perry Finnerman | Director of Photography |
| Editing | Buddy Small | Editor |
| Directing | Joseph Sargent | Director |
