Besides Caroline having the twins, have we ever seen a vampire in a hospital bed? What can possibly be going on here? Is Damon sick? (And if so, how!? Why!?!) Or are the brothers just plotting something? Hmmm.
Sybil enlists Caroline in her hunt for a mystical talisman which can be used against her. Sybil's immortality depends on recovering this object, and no one (besides Matt Donovan) knows Mystic Falls better than Caroline Forbes.