In this stunning sequel to 2001: A Space Odyssey, ex-NASA chief Heywood Floyd (Roy Scheider) helms a U.S.-Soviet mission of scientists (including John Lithgow and Helen Mirren) trying to rendezvous with the abandoned Discovery spacecraft to reactivate the homicidal HAL 9000 computer and learn the truth. Set with Earth on the verge of nuclear war, this tense epic from director Peter Hyams earned five Oscar nods.