In a bid to determine the identity of the remaining crew of U.S. Outpost 31, R.J. MacReady developed a rudimentary blood-test involving a heated copper wire and samples taken from the men. Noticing how every part of the Norris-Thing had an instinctive desire to survive, MacReady realized that a creature's blood would attempt to flee from a hot needle. Dipping the heated wire into the petri dish containing Palmer's blood, the organism unexpectedly reacted, jumping out of the dish with a shriek. Shocked, MacReady dropped the sample to the ground, where it promptly liquefied and fled.
Its identity revealed, the bound Palmer-Thing began to violently transform and shed its ropes. After MacReady's flamethrower fails to ignite, the creature kicks off from the floor and latches onto the ceiling. Windows attempts to burn it, but hesitates after it drops to the floor; giving the creature time to split its head open and wrap a prehensile tongue around the man's throat. Closing its jaws around his head, the Thing violently mauls the radio-operator before throwing him aside. His equipment functioning again, MacReady torches the Palmer-Thing, causing it to break through the rec room wall in a bid to escape. The Thing collapses in the snow outside, where it is finished off by MacReady using a stick of dynamite.