With a scandalous secret looming over Lindsay and Everett's relationship, the pressure is on for the power couple to sink or swim. The roommates must come together to throw a race for charity, but not everyone will make it out in one piece. And finally, Cristina's meddling catches up to her when Lauren and Jaclyn go on the attack.

Summer's over, and that means one last wild weekend with no regrets...or maybe a few. A Hamptons White Party turns into a messy affair when Kyle blows up at his ex-girlfriend Amanda over a lip-syncing scandal. Meanwhile, Cristina makes a dramatic exit, and Carl  and Lauren's romantic pretzel twists one final time, when Carl disappears into the night.