"What's Eating Dexter Morgan?" is the third episode of the eighth season of the Showtime television series Dexter. The episode originally aired on July 14, 2013. It was directed by Ernest Dickerson and written by executive producer Lauren Gussis, who have both worked on the series for several years. The episode received mixed reviews, with reviewers critical of its "meandering" pace but praising Deb's character arc and Carpenter's performance.