"Remedial Chaos Theory" is the third (aired as fourth) episode of the third season of the U.S. television series Community. The episode was written by Chris McKenna and directed by Jeff Melman. It originally aired on October 13, 2011 on NBC. The episode features a housewarming party for Troy and Abed panning out in seven alternate timelines. Each timeline explored the effect of the absence/presence of a character on other characters in similar situations.