Spoiler alert: There's a lot of death on "The Vampire Diaries." Sometimes it's a character you've come to know and love over many years. Sometimes it's just a pizza-delivery girl you just met for the first time in last week's episode and who presumably had a long, fruitful life ahead of her -- it's not like she was going to be a pizza-delivery girl forever. She had plans. But somehow the characters that deserve to die never get killed, and all we can do is wonder why. Well, while we can't answer why, we can answer when.