The O.C. (2003)

S4E6 The Summer Bummer

Kaitlin plans a wild party at her house to get back at the school's queen bee. While Seth is off visiting Summer at Brown, Sandy and Kirsten seize the opportunity to connect with Ryan. However, Seth arrives to find nothing but an unoccupied dorm room. Meanwhile, Julie makes progress with her dating service and unexpectedly uncovers a new twist.