E.J. Mackernutt, Jr., an 11-year-old boy who has always been fascinated by space and astronauts, sneaks into Cape Kennedy and becomes a stowaway on a spaceship scheduled for a lunar landing. After he is discovered, NASA at first cancels the landing, but E.J. and the astronauts convince them to go forward with it. Problems arise when one of the astronauts is incapacitated by illness and the other two are stranded on the moon's surface, but E.J. is able to command the space capsule and save the day.
Lloyd Bridges
as Charlie Englehardt
Jeremy Slate
as Astronaut Capt. Rick Lawrence
Jim McMullan
as Astronaut Ben Pelham
Morgan Paull
as Astronaut Dave Anderson
Michael Link
as Eli 'E.J.' Mackernutt, Jr.
John Carradine
as Jacob Avril
Jack Callahan
as Dr. Jack Smathers
Charles Conrad
as Himself
Walter Brooke
as Whitehead
Keene Curtis
as Tom Estes
Edward Faulkner
as Eli Mackernutt, Sr.
Jon Cedar
as Hans Hartman
