The Astronaut

Jackie Cooper

— Kurt Anderson

Monte Markham

— Eddie Reese / Col. Brice Randolph

Richard Anderson

— Dr. Wylie

Robert Lansing

— John Phillips

Susan Clark

— Gail Randolph

John Lupton

— Don Masters

Walter Brooke

— Tom Everett

James B. Sikking

— Astronaut Higgins

Paul Kent

— Carl Samuels

Loretta Leversee

— Toni Scott

Ray Dimas

— Freddie

Patsy Garrett

— Boy's Mother

Tom Hallick

— Agent Wilson

John S. Ragin

— Walters

Paul Micale

— Beachgoer

Richard Stahl

— Fred, Beachgoer's Friend

Bob Harks

— Photographer (uncredited)