cast
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Cliff Robertson
Lt. John F, Kennedy
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Ty Hardin
Ensign Leonard J. Thom
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James Gregory
Commander C.R. Ritchie
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Robert Culp
Ensign George 'Barney' Ross
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Grant Williams
Lt. Alvin Cluster
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Lew Gallo
Yeoman Rogers
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Errol John
Benjamin Kevu
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Michael Pate
Lt. Reginald Evans
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Robert Blake
Charles 'Bucky' Harris
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Biff Elliot
Edgar E. Mauer
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Norman Fell
Edmund Drewitch
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James McCallion
Pat McMahon
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Joseph Gallison
Harold Mamey
- William Douglas Gerald Zinser
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Sam Gilman
Raymond Starkey
- Clyde Howdy Leon Drawdy
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Buzz Martin
Maurice Kowal
- Sam Reese Andrew Kirksey
- Glenn Sipes William Johnson
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John Ward
John Maguire
- David Whorf Raymond Albert
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George Takei
Helmsman on Japanese Destroyer (uncredited)
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Andrew Duggan
Narrator (uncredited)
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Roger Davis
Radioman (uncredited)
- Jerry Earle Kraft Extra (uncredited)
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George Gaynes
PT Flotilla Captain (uncredited)
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Chuck Hicks
Cook (uncredited)
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Dale Ishimoto
Commander (uncredited)
- Barney Ross Chief Benson (uncredited)
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Sheb Wooley
Edmund Drewitch's Scream (archive sound) (uncredited)