Jack Lemmon as Rip Crandall

Ricky Nelson as Tommy Hanson

John Lund as Wilbur Vandewater

Chips Rafferty as Patterson

Tom Tully as Captain McClung

Joby Baker as Josh Davidson

Warren Berlinger as A.J. Sparks

Patricia Driscoll as Maggie

Mike Kellin as Jack MacCarthy

Richard Anderson as Dennis Foster

Alvy Moore as Johnson

Teru Shimada as Samada

George Shibata as Captain Shigetsu

Phil Adams as Crewman (uncredited)

John Anderson as Sailor (uncredited)

Tom Anthony as Crewman (uncredited)

Nesdon Booth as Chief Petty Officer (uncredited)

Naaman Brown as Cpl. Goroka (uncredited)

Lysa D'Anjou as French guide (uncredited)

Fuji as Japanese Sergeant (uncredited)

Clive Halliday as Australian Major General (uncredited)

Gavin W. Harper as Seaman (uncredited)

Dale Ishimoto as Japanese Pilot (uncredited)

Roy Jenson as Shark Bait - USS Echo Crewman (uncredited)

Richard Quine as Narrator (uncredited)

Hudson Shotwell as Adm. Hathaway (uncredited)

Sid Tomack as Arthur, Bartender at Kangaroo Club (uncredited)

Richard Torrence as Horse (uncredited)

Ron Veto as Native (uncredited)

Russ Whiteman as American Colonel (uncredited)