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George Maharis as Peter Santelli |
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Robert Morse as Oliver Cromwell Cannon |
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Anjanette Comer as Tiara Marshall |
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James Gregory as Vice Admiral |
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Michael Constantine as Mikhail Drozhensky |
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Howard St. John as Harvey T. Sweigert |
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Norman Fell as George Snell |
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Janine Gray as Diana Grenville-Wells |
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Bernard Fox as Leslie Folliott |
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Richard LePore as Ben Livingston |
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Conlan Carter as Orville Bayleaf |
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Yvonne Craig as Sharon Sweigert |
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Doodles Weaver as Ham Operator |
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Pat Priest as Stewardess |
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Frank London as Shaggy Type |
| Writing | Dale Wasserman | Screenplay |
| Directing | Delbert Mann | Director |
| Writing | Philip Benjamin | Novel |
| Crew | Stephanie Epper | Stunts |
| Editing | Fredric Steinkamp | Editor |
| Production | Douglas Laurence | Producer |
| Camera | Russell Harlan | Director of Photography |
| Art | E. Preston Ames | Art Direction |
| Art | George W. Davis | Art Direction |
| Production | Delbert Mann | Producer |
