S1, E5: It's their first official date and Dan tries to impress Serena with an elaborate plan for the date, but fails to understand that Serena is happier with beer than champagne. That same night Jenny is invited to the infamous Blair Waldorf sleepover and finds herself in a high stakes game of "Truth or Dare." Meanwhile, Lily finds out that Erik is missing from the treatment center, and she finds herself seeking help from her ex-boyfriend, Rufus.