Hangar 18

During a Space Shuttle mission a satellite rams a unidentified flying object. The UFO afterwards performs an emergency landing in the deserts of Arizona. However, the White House denies its existence because of the near presidential elections. Harry Forbes (Darren McGavin), deputy director of NASA, is brought to Hangar 18 with his friend Lew Price (James Hampton) and Steve Bancroft (Gary Collins). The UFO's two crew members are found dead, and a human woman in a stasis chamber later wakes up, screaming. Researchers discover that symbols on the control panels match those used by ancient Earth civilizations, and video footage shows extensive surveillance of power plants, military bases, industrial plants, and major cities worldwide. As Bancroft and Price fight against the government's cover-up, they uncover evidence that the aliens have been to Earth before and that human beings are their descendants.