The Thing (1982)
At a secluded research facility in Antarctica, a team of twelve scientists stumbles upon an extraterrestrial entity entombed in ice for more than a century. When it is accidentally thawed, this shape-shifting being unleashes chaos and fear among the crew, as it stealthily assimilates into their ranks, turning friend against friend and sowing distrust. As paranoia escalates, the team must confront the horrifying reality that one of them may not be who they claim to be.
