In the previous episode Elena comes up with her own plan to deal with her situation and offers Rose a tempting incentive for her help. When plans change unexpectedly, Rose asks Damon to help with Elena's plan. Tyler shows Caroline the Lockwood's cellar where she makes a terrifying discovery. Jeremy and Bonnie attempt to retrieve the moonstone, but Stefan ends up in danger when things don't go as planned. Bonnie and Luka also become closer.Watch The Vampire Diaries S02EO11 tittle by the light of the moon . this episode air on 9th of December 2010. With a full moon approaching, Caroline helps Tyler prepare for his inevitable transformation. Stefan and Katherine play mind games on each other, and Damon and Alaric become suspicious when a mysterious visitor named Jules shows up in Mystic Falls, looking for her missing friend, Mason. Elena is frustrated at Jeremy and her friends' excessive efforts to protect her. Bonnie and Luca team up to work on a spell, though both continue to keep secrets from each other. Finally, Elijah makes an unexpected appearance with an offer that could change everything.