Things I am utterly confused about: 1. How did Stefan get into hell (or where ever Cade was) to kill him? Was that the plan all along? 2. Why Kathrine? She was sort of on the fence of badness when she died. I can think of soooooo many people worse than her. 3. Kai told Caroline the armory is THE WORST PLACE for the…

Also, does Elena only have an ounce of blood? If it's been so easy to get the cure this whole time, why can't they get more if they want?