On the Threshold of Space
VoltarElenco
Guy MadisonCapt. Jim Hollenbeck
Virginia LeithPat Lange
Dean JaggerDr. Hugo Thornton
John HodiakMaj. Ward Thomas
Martin MilnerLt. Mort Glenn
Warren StevensCapt. Mike Bentley
King CalderLee Welch
Walter CoyLt. Col. Dick Masters
Ken ClarkSgt. Ike Forbes