BIRTHDAYS AND GOOD-BYES - Although Caroline is in no mood to celebrate her 18th birthday, Elena, Bonnie and Matt surprise her with a small party in an unusual location. Damon and Stefan disagree on the best way to handle Klaus, and a reckless Stefan decides to test his theory by taking things to dangerous extremes. Bonnie is concerned when Elena tells her about Jeremy's new plans. At a Founder's meeting, Alaric once again runs into Dr. Fell (guest star Torrey Devitto), who is in the middle of an argument with her ex-boyfriend, the medical examiner (guest star David Colin Smith). Tyler refuses to go along with Klaus' latest demand, and is surprised when Klaus seems to accept his decision. Wendey Stanzler directed the episode written by Rebecca Sonnenshine.