T6, E22: In the aftermath of Alaric and Jo's (recurring guest star Jodi Lyn O'Keefe) powerful nuptials, things take a dramatic turn when an uninvited guest shows up, leaving Elena in terrible jeopardy. Despite Matt's advice to leave town to protect herself, a defiant Bonnie takes matters into her own hands after finding herself on the receiving end of a twisted plan. As Stefan and Caroline reach an emotional crossroads in their relationship, a reunion with Liv (recurring guest star Penelope Mitchell) leaves Tyler faced with a decision that could change his life forever. Meanwhile, Lily's (recurring guest star Annie Wersching) reckless actions cause Stefan to realize the lengths to which his mother will go to reunite with her "family." Finally, after a devastating chain of events, Damon is forced to make the most difficult decision of his life.