Wilhelm 'Billy' von Huber
Ralph Stanton
Dr. Wilhelm von Huber
Dr. Donni McGuinness
Ed the Bully
Little Kid
Narrator (voice)
Fielding
Gertz
Gerta
Alan Shepard
Guidance Technician
Dexterity Technician
Dieter
Telemetry Technician
Rudolph
Roger Thornhill
Mother on Beach