Lauren and Dash face-off in a friendly debate that escalates into a public battle. Will their red hot romance suddenly turn ice-cold. KC says "I love you" to Peter-only to discover he's planniing to leave her. Bored with her good-girl image, Faith gets a fake ID. Will the beer-drinking bar crowd become her undoing? Melissa and Brooks are engaged, but they can't agree on anything. Brooks expects Melissa to use his last name, but Melissa says no way!