William Marshall Director Dean Fredericks Capt. Frank Chapman Actor Coleen Gray Liara Actor Anthony Dexter Herron Actor Dolores Faith Zetha Actor Francis X. Bushman Sessom Actor Richard Weber Lt. Ray Makonnen Actor Al Jarvis Judge Eden Actor Dick Haynes Col. Lansfield Actor Earl McDaniel Capt. Leonard Actor Mike Marshall Lt. White Actor John Herrin Capt. Beecher Actor Mel Curtis Lt. Cutler Actor Jimmy Weldon Lt. Webb Actor Akemi Tani Communications Officer Actor Lori Lyons Radar Officer Actor Richard Kiel The Solarite Actor Fred Gebhardt Producer