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Sidney Poitier as Dr. Matt Younger |
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Ester Anderson as Catherine Oswandu |
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Yvette Curtis as Stefanie Younger |
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George Baker as Dr. Henry Barlow |
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Johnny Sekka as Dr. Joseph Myomo |
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Earl Cameron as Ambassador George Oswandu |
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Hilary Crane as Marsha Barlow |
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John Beardmore as Burberry Detective (uncredited) |
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Milos Kirek as General Kuznovski (uncredited) |
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Letta Mbulu as Club Singer (uncredited) |
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T. P. McKenna as Man (uncredited) |
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James Payne as Taxi Driver at Theatre (uncredited) |
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Lon Satton as Man (uncredited) |
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Guy Standeven as Party Guest (uncredited) |
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Rudolph Walker as Man (uncredited) |
| Directing | Sidney Poitier | Director |
| Costume & Make-Up | Harold Melvin | Hairstylist |
| Costume & Make-Up | W.T. Partleton | Makeup Artist |
| Writing | Lawrence Roman | Writer |
| Editing | Pembroke J. Herring | Editor |
| Editing | Peter Pitt | Editor |
| Production | Miriam Brickman | Casting |
| Camera | Paul Beeson | Director of Photography |
| Production | Melville Tucker | Producer |
| Directing | Doreen Soan | Continuity |
| Sound | Coleridge-Taylor Perkinson | Original Music Composer |
| Crew | Tony Brubaker | Stunt Double |
| Directing | David Tomblin | First Assistant Director |
| Art | Elliot Scott | Art Direction |
| Production | Terence A. Clegg | Production Manager |
