Michael C. Hall was hard at work on the LA set of Dexter yesterday with a very cute costar. Today, the Emmy-nominated actor took a break from filming to join a panel discussion at the TCA about the show's soon-to-debut fifth season. Afterward, we sat down with MCH to talk about last year's shocking finale and all the intense cliffhangers still to come. He revealed that Dexter will definitely wrestle with a new emotion for him, guilt, over Rita's death and that the cast's new addition, Julia Stiles, won't play a "traditional" love interest to the now-single serial killer. When we pressed him for more on the relationship, he didn't want to give away too much. Stay tuned for tomorrow's PopSugar Rush for our interview with Dexter himself and some new hints about what's to come!