Based on the 1938 John W. Campbell Jr. novella Who Goes There?, it tells the story of a group of American researchers in Antarctica who encounter the eponymous "Thing", an extraterrestrial life-form that assimilates, then imitates, other organisms. The group is overcome by paranoia and conflict as they learn that they can no longer trust each other and that any of them could be the Thing. The film stars Kurt Russell as the team's helicopter pilot R. J. MacReady, with A. Wilford Brimley, T. K. Carter, David Clennon, Keith David, Richard Dysart, Charles Hallahan, Peter Maloney, Richard Masur, Donald Moffat, Joel Polis, and Thomas G. Waites in supporting roles.