The story begins during a NASA space shuttle mission when a satellite launch goes disastrously wrong. An unidentified flying object (UFO) suddenly appears and collides with the satellite, killing an astronaut who was performing an extravehicular activity (EVA).
: The surviving astronauts, Steve Bancroft (Gary Collins) and Lew Price (James Hampton), are blamed for the mission's failure and the death of their colleague. Suspecting the truth, they launch their own investigation to clear their names while government agents attempt to eliminate them. Hangar 18(1980)
: The damaged UFO makes an emergency landing in the Arizona desert. To avoid a political scandal during an election year, the White House Chief of Staff (Robert Vaughn) orders a total cover-up. The ship is secretly transported to the lunar receiving facility at Hangar 18 for study. The story begins during a NASA space shuttle