Lloyd Bridges

Colonel Floyd Graham

Osa Massen

Dr. Lisa Van Horn

John Emery

Dr. Karl Eckstrom

Hugh O´Brian

Noah Beery Jr.

Major William Corrigan

Hugh O'Brian

Harry Chamberlain

Morris Ankrum

Dr. Ralph Fleming

Patrick Aherne

Reporter #1

Sherry Moreland

Martian girl

John Dutra

Physician

Kathy Marlowe

Reporter

Tom Coleman

Reporter (uncredited)

James Conaty

Doctor Taking Lisa's Blood Pressure (uncredited)

Sam Harris

Reporter at Press Briefing (uncredited)

Judd Holdren

Reporter #3 (uncredited)

Stuart Holmes

Reporter (uncredited)

Barry Norton

Reporter (uncredited)

Cosmo Sardo

Reporter (uncredited)

Bert Stevens

Reporter (uncredited)

Kurt Neumann

Director

Frank Heath

Asistente de Dirección

Orville H. Hampton

Guión, Dialogue

Dalton Trumbo

Guión

Kurt Neumann

Guión

Karl Struss

Director de Fotografía

Ferde Grofé

Compositor de la Música Original

Ferde Grofé Sr.

Compositor de la Música Original

Tom Lambert

Sound Engineer

Kurt Neumann

Productor

Lippert Productions

Compañía de Produccion

Murray Lerner

Productor Ejecutivo

Betty Sinclair

Production Manager

Mike Matney

Production Manager

Don L. Cash

Maquilladora

Harry Gerstad

Editor

Theobold Holsopple

Diseño de Producción

Clarence Steensen

Decorados

Don Stewart

Special Effects

Lou Asher

Property Master

Frank Heath

Second Unit Cinematographer