PAST RETURNS FOR DAMON chase - Damon realizes that Elena is in danger and goes to Stefan for help to find her. The brothers pay a visit to Aaron and Damon leaves Stefan in shock when he reveals what he knows firsthand about the family of Aaron. In an attempt to stop Damon, Dr. Wes gives free rein to his secret weapon, forcing Damon to deal with a part of his past he thought he had left behind forever, and the consequences of the plan revenge that developed over decades. Meanwhile, Elena is horrified with the confessions of Dr. Wes on the dark history of the University of Whitmore and his own ultimate goal. Finally, a frantic Katherine goes to Matt for help, until he realizes that Nadia may be the only one who can solve your problem.