Biography: ​From Wikipedia, the free encyclopedia.   John C. Thomas is an American screenwriter based in California. With his brother Jim Thomas, he wrote or was substantially involved in the screenplays of the following films: Predator (1987), Predator 2 (1990), Executive Decision (1996), Wild Wild West (1999), Mission to Mars (2000), and Behind Enemy Lines (2001). Description above from the Wikipedia article John Thomas, licensed under CC-BY-SA, full list of contributors on Wikipedia.