Jordan Hayes
Henry Taylor
Wernher von Braun
Brad Lund
Tad Whitney
Dr. Francis Dulmacher
Nathan
Ted Brockhart
Narrator (voice)
President Richard Adar
Donald Menken
Charles Carver
Sir Reginald Hargreeves
Major Mackie
George Guber
Ray Mercer
King Laufey
Anton Pascola
Alex Dent / Billy Frazer
Giuliano Della Rovere
Admiral Kimmel
Dr. Malcolm Walsh
Selinger
Greco