"Basic Lupine Urology" is the seventeenth episode of the third season of the American comedy television series Community and the sixty-sixth episode overall. It was written by Megan Ganz and directed by Rob Schrab. It originally aired in the United States on April 26, 2012, on NBC. In the episode, the study group must figure out who killed the yam they were growing for a biology class project. Troy and Abed lead the investigation and track down suspects, while Jeff and Annie work to build a case against whoever did it. As they dig deeper, the group encounters several challenges that threaten to derail their case.