My Babysitter's a Vampire/Heartwarming


 * Sarah, giving up the potion that would've turned her human to save Ethan from being a werewolf.
 * Then later in the season finale, Sarah giving up her final chance at humanity and forcing her to become immortal after Jesse bites Ethan, forcing either Ethan to become one, or her.
 * The season 1 finale, when Sarah, Rory and Erica are outside of Ethan/Benny's house, comforting Sarah and congratulating her on becoming immortal.