Robert Walker Jr.
— Ensign Frank Pulver
Burl Ives
— Captain Morton
Walter Matthau
— Doc
Tommy Sands
— Bruno
Millie Perkins
— Scotty
Kay Medford
— Head Nurse
Larry Hagman
— Billings
Peter Marshall
— Carney
Joseph Marr
— Dowdy
Gerald S. O'Loughlin
— LaSueur
Diana Sands
— Mila
Robert Matek
— Stretch
Jack Nicholson
— Yeoman Dolan
Al Freeman Jr.
— Taru
Richard Gautier
— Stefanowski
George Lindsey
— Lindstrom
Sal Papa
— Gabrowski
James Farentino
— Insigna
James Coco
— Skouras
Don Dorrell
— Payne
Michael Daves
— Sergeant on Plane Wing (uncredited)
James Davidson
— Bookser (uncredited)
Roger Ewing
— Jackson (uncredited)
Zack Foster
— Schlemmer (uncredited)
Larry Merrill
— Reber (uncredited)
Adam Roarke
— Mechanic (uncredited)
Ronnie Rondell Jr.
— Sailor (uncredited)
Buck Taylor
— Mannion (uncredited)
King Calder
— Governor (uncredited)