S04E06 - The Summer Bummer - "The 'Is that a threesome?' Episode"

The O.C. - Season 4, Episode 6 - "The Summer Bummer". Summer deals with some bummer news and heads back to Newport, while Seth ends up in Rhode Island with time to kill. Kaitlin tries recapturing some of her youth by throwing a rager at her house, while Ryan deals with his possible feelings for Taylor through a series of ridiculous daydreams. BANG!