Calificación
Reparto

Lloyd Bridges
Charlie Englehardt

Jeremy Slate
Astronaut Capt. Rick Lawrence

Jim McMullan
Astronaut Ben Pelham

Morgan Paull
Astronaut Dave Anderson

Michael Link
Eli 'E.J.' Mackernutt, Jr.

John Carradine
Jacob Avril

Jack Callahan
Dr. Jack Smathers

Charles Conrad
Himself

Walter Brooke
Whitehead

Keene Curtis
Tom Estes

Edward Faulkner
Eli Mackernutt, Sr.

Jon Cedar
Hans Hartman

Barbara Faulkner
Mrs. Mary Mackernutt

Stephen Rogers
Joey Williams