Eddie Albert

Adm. Wiley Sloan

John Carradine

Ronald Bentley

Alex Cord

Dr. Sam Marlowe

Robert Forster

Comdr. Jeff Selkirk

Frank Gorshin

Dan Wesker

Mark Harmon

Peter Cabot

Christopher Lee

John McKenzie

Laurence Haddon

Cpt. Volero (uncredited)

Julie Bennett

Sylvia King

John Brandon

Chief Engineer (uncredited)

Kirk Cameron

Liam

Hedley Mattingly

Bailey