All Cast
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