Plot hole: After the astronauts escape in the plane and has to make a crash landing, James Brolin's character says that he will head west, OJ Simpson's character should head north, and Sam Waterson's character to go south. If Brolin is INDEED walking west, then north would be to his right, but Waterson heads that way (instead of south) and Simpson heads the other way (instead of north). A few minutes later when Simpson is killed, the flare goes off on Brolin's left side (south), instead of north. And the same for Waterson.
Plot hole: For such a well-financed, well-organised bunch of ruthless killers the people who try to clean up the mess that NASA leaves behind seem to have the intelligence of a cheese sandwich. 'Disappearing' one of their employees - the one who works out the discrepancy in the triangulation of the radio signals - is an obvious necessity but replacing him with a woman who claims to have lived in his apartment for years is stupid beyond explanation. The reporter knows that she is lying - it's as if they wanted to confirm that his suspicions of a conspiracy were true (and hence worth investigating). What is to stop him checking with the man's neighbours, or local shops? What about his bank, credit card suppliers, utility companies, friends and family who would have been in contact with him at that address? What about the landlord, or the mortgage company, or vehicle or driver's licence registration? What about the local electoral roll? There would be official records going back to the day he moved in to the apartment, and neither NASA nor their hired killers could have accessed all of that information even if they knew about it.
Plot hole: Somehow, Elliot Gould and James Brolin drive several hundred miles through a desert and halfway across the country in Gould's car (a Datsun 280-Z)in a matter of a few minutes, to arrive at Brolin's supposed funeral in Houston, Texas revealing the conspiracy. I used to own a 280-Z and they are not that fast.
Add timeKit Sullivan