I actually wrote this one a few months ago, but since some other people here were posting their stories I thought maybe it would be worthwhile to share my own.
With this one, I decided to take a rather unusual approach. The Thing itself, while still important, has little to no appearances within this story. The plot involves R.J. MacReady and Childs being rescued by a Russian expedition team, the same team who have spent the last few days looking after a traumatized and seemingly insane Kate Lloyd. Working alongside the Russian team, particularly the camp's doctor and the base commander, both of whom are initially skeptical but when confronted by proof in the form of a crashed spaceship become determined to help Mac, Childs and Kate in their mission to destroy the Thing once and for all.