['The Vampire Diaries' -- 'Ghost World']
I wasn't exactly thrilled by Mason's return to Mystic Falls in 'Smells Like Teen Spirit' -- especially because I knew he was back to seek revenge on Damon -- but OMG I love Lexi. Seriously, she's probably one of my favorite characters in 'TVD' history, even though she's only really been in a handful of episodes. And after seeing the way she smashed Stefan's head into the window of a car, how could you not love her?!
All of the girls in Mystic Falls have some serious problems. Their boyfriends are either dead, undead, in love with dead girls or are crazy rippers. So it's nice to have a strong, badass female character in the mix -- because the status of Katherine's life is still TBD at the moment.