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

Gerald S. O'Loughlin

LaSueur

Diana Sands

Mila

Jack Nicholson

Yeoman Dolan

Al Freeman Jr.

Taru

Richard Gautier

Stefanowski

George Lindsey

Lindstrom

James Farentino

Insigna

James Coco

Skouras

James Davidson

Bookser (uncredited)

Roger Ewing

Jackson (uncredited)

Adam Roarke

Mechanic (uncredited)

Ronnie Rondell Jr.

Sailor (uncredited)

Buck Taylor

Mannion (uncredited)

King Calder

Governor (uncredited)