Emma is conflicted about losing her virginity to Thayer while still holding unresolved feelings for Ethan. The tension causes Thayer to pick a fight with Ethan - and spurs Ethan to kiss Emma. Meanwhile, Emma grows more and more suspicious that Ted might be responsible for Derek's murder, while Rebecca remains resolved to pin the murder on Alec. Dan and Theresa try to prepare for their wedding, but Theresa's growing obsession with the Derek Rogers investigation may put her life in danger.