Glenn Ford
— Lt. J.G. Max Siegel
Gia Scala
— Melora Alba
Earl Holliman
— Adam Garrett
Anne Francis
— Lt. Alice Tomlen
Keenan Wynn
— Gordon Ripwell
Fred Clark
— Lt. Cmdr. Clinton T. Nash
Eva Gabor
— Deborah Aldrich
Russ Tamblyn
— Ens. Tyson
Jeff Richards
— Lt. Ross Pendleton
Mickey Shaughnessy
— Farragut Jones
Howard Smith
— Admiral Junius Boatwright
Romney Brent
— Mr. Alba - Melora's Father
Mary Wickes
— Janie
Jack Straw
— Lt. Cmdr. Gladstone
Robert Nichols
— Lt. Cmdr. Hereford
John Alderson
— Lt. Cmdr. Diplock
Jack Albertson
— Rep. George Jansen
Charles Watts
— Rep. Arthur Smithfield
Mike Steen
— Marine Orderly (uncredited)