Jesse Williams' highly anticipated return to Grey's Anatomy had Jackson and Meredith at odds before Ellen Pompeo left Grey Sloan Memorial - again. During the Thursday, October 30, episode of the hit ABC series, Jackson (Williams) was back at Grey Sloan Memorial Hospital to help with a reconstructive surgery. His first interaction with Meredith (Pompeo) was far from perfect after she saw Tom Koracick's (Greg Germann) published paper about Alzheimer's research. Meredith pointed out that Koracick's work didn't factor in female patients, but Jackson fired back at her criticism of his mentor.