Walter Pidgeon

Admiral Harriman Nelson

Robert Sterling

Captain Lee Crane

Barbara Eden

Lieutenant Cathy Conners

Peter Lorre

Comm. Lucius Emery

Joan Fontaine

Dr. Susan Hiller

Michael Ansara

Dr. Miguel Alvares

Frankie Avalon

Lieutenant Chip Romano

Regis Toomey

Dr. Jamieson

John Litel

Vice Admiral B.J. Crawford

Howard McNear

Congressman Llewellyn Parker

Henry Daniell

Dr. Zucco

Robert Easton

Sparks

Charles Tannen

CPO Mack Gleason

Mark Slade

Seaman Jimmy 'Red' Smith

Del Monroe

Seaman Kowski

Jonathan Gilmore

Seaman George Young

Anthony Monaco

Cookie

Skip Ward

Crew Member

Michael Ford

Crew Member

William Herrin

Crew Member (Uncredited)