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