Out in space astronauts Bancroft Price & Gates, Garry Collins James Hampton & J.R Clark, are about to launch a satellite from their space craft when this UFO suddenly appears and hovers over their spaceship. Unable to prevent the launch it goes off and slams into the UFO, the explosion of the satellite cause Gates to be ripped from out of the craft and end up dead. The NASA crew monitoring the launch, back on earth in Huston, catches the entire scene on tape but it's soon deleted, or erased, by orders from higher ups and both Bancroft & Price are implicated in Gates death due to their negligence .
With two weeks before the presidential election President Duncon Tyler's staff headed by Gordon Cain & Frank Lafferty, Robert Vaughn & Joseph Campanella, want the incident to be kept from the public in order not to hurt Tyler's chances for re-election; the UFO that caused all this nervousness in both the White House and the Pentagon wasn't destroyed by the space-crafts satellite it landed safe on earth in Bannon County Arizona with it's two alien pilots, or spacemen, dead of asphyxiation and the news of that amazing fact can well destroy Tyler's chances.
President Tyler making a big issue of his opponent believing in UFO's, or interstellar spacecrafts, and how irresponsible he is to be elected president of the United States and here, just 14 days before the election, there's solid evidence that they do exist! With both Bancroft and Price trying to find NASA deputy director and friend Harry Forbes, Darren McGavin, to exonerate them in Gates' death Forbes, and his staff at NASA, are sent to Wolf AFB in Midland Texas at the facilities Hanger 18 where the UFO is being held.
Not knowing what's happening in the outside world, Forbes & Co. were kept in the dark about what was going on with both Bancroft & Price. Forbes and his assistants Paul Bannister, Steven Keats, and Neal Kelso, Andrew Bloch, decipher the alien hieroglyphs and come to the startling conclusion that their not only studying the Human Race but in fact created it tens of thousands of years ago and may well be the "missing link" between man and ape; as Forbes astoundingly says to his stunned and shocked staff: Were Their Children!
Back outside Bancroft & Price who are trying to get to Wolf AFB and Hanger 18, they find out that it's there where the UFO is being kept, are cased by government agents which results in Price, as well as four agents, getting killed. Finally reaching the Wolf military base and getting in touch with Forbes, who found out about what was going on by listening to a radio inside the UFO, it's decided, by Forbes and his staff, to go pubic with what's been happening at Hanger 18 and how the US government is trying to cover it up.
Feeling that their control of the information about the captured UFO is slipping away from them and that it's only a matter of time before the US, and world, public will know the truth Cain & Co. have a jet, loaded with high explosives, flown into Hanger 18 by remote control in order to destroy the evidence as well as Bancroft Forbes and everyone else in there; planes crash every day a diabolical Cain tells his fellow criminals and future cell-mates.
Cain's scheme is only partly successful because what he didn't count on is that the UFO is not of this, and built from material that's far more durable then anything on, earth and thus not subject to the damage that the explosives on the runaway jet plane can do to it and even more disturbing, to Cain & Co., Forbes Bancroft and Forbes entire NASA staff were in the UFO at the time that the plane crashed into Hanger 18.
Review by sol1218 from the Internet Movie Database.