Seth and Zach squabble over who should take Summer to the prom and who will meet George Lucas for dinner over the publishing of the graphic novel. Meanwhile, Sandy takes drastic actions with a recovering Kirsten. Ryan starts to piece together what happened between Trey and Marissa and runs into his old girlfriend Theresa. Also, Julie decides to murder Caleb to avoid going broke. But her attempts to poison Caleb take a surprising turn.