 Brooke, Peyton, Haley and Anna (Daniella Alonso) have a slumber party at Haley s apartment where secrets and lies are revealed. Meanwhile, when Lucas and Nathan go on a road trip to a Bobcats game, Nathan reveals he is being tested for the genetic defect that caused Dan s heart attack and suggests Lucas do the same. After an awkward encounter with Keith and Jules (guest star Maria Menounos), Karen and Andy (guest star Kieren Hutchison) share an intimate night together.