Lt. John F, Kennedy
Cliff Robertson
Ensign Leonard J. Thom
Ty Hardin
Edmund Drewitch
Norman Fell
Pat McMahon
James McCallion
Harold Mamey
Joseph Gallison
Gerald Zinser
William Douglas
Raymond Starkey
Sam Gilman
Leon Drawdy
Clyde Howdy
Maurice Kowal
Buzz Martin
Andrew Kirksey
Sam Reese
William Johnson
Glenn Sipes
John Maguire
John Ward
Commander C.R. Ritchie
James Gregory
Raymond Albert
David Whorf
Helmsman on Japanese Destroyer (uncredited)
George Takei
Narrator (uncredited)
Andrew Duggan
Radioman (uncredited)
Roger Davis
Extra (uncredited)
Jerry Earle Kraft
Ensign George 'Barney' Ross
Robert Culp
Lt. Alvin Cluster
Grant Williams
Yeoman Rogers
Lew Gallo
Benjamin Kevu
Errol John
Lt. Reginald Evans
Michael Pate
Charles 'Bucky' Harris
Robert Blake
Edgar E. Mauer
Biff Elliot
Director
Leslie H. Martinson
Stunts
Bob Herron
Dean Smith
Paul Baxley
Original Music Composer
William Lava
Chuck Hicks
Screenplay
Richard L. Breen
Adaptation
Howard Sheehan
Vincent X. Flaherty
Novel
Robert J. Donovan
Makeup Supervisor
Gordon Bau
Assistant Director
C.M. Florance
Producer
Bryan Foy
David Buttolph
Director of Photography
Robert Surtees
Editor
Folmar Blangsted
Art Direction
Leo K. Kuter
Set Decoration
John P. Austin