Richard "Reef" Holloway

Arthur Franz

Acting

Dan Wendover

Dick Foran

Acting

Carl Neilson Jr.

Brett Halsey

Acting

Ian Hunt

Tom Conway

Acting

David Milburn

Paul Dubov

Acting

"Grif" Griffin

Bob Steele

Acting

Clifford Kent

Victor Varconi

Acting

Julie

Joi Lansing

Acting

Admiral Terhune

Selmer Jackson

Acting

Justin Murdock

Jack Mulhall

Acting

Helen Milburn

Jean Moorhead

Acting

Frogman Carney

Richard Tyler

Acting

Frogman Powell

Kenneth Becker

Acting

Chester Tuttle

Sid Melton

Acting

Watkins

Frank Watkins

Acting

Narrator

Pat Michaels

Acting

Saucer Voice (voice)

John Hilliard

Acting

Passerby (uncredited)

Edmund Cobb

Acting

Passerby (uncredited)

Frank Lackteen

Acting