While trapped in Mystic Falls by a spell, Klaus helps Caroline and Tyler translate the Aramaic code on the Hunter's sword. They discover a devastating truth: there is only enough of the cure for one person, shattering the alliances between the characters.
On the island, Jeremy and Bonnie locate Silas' tomb. They find the cure fossilized in Silas' hands and realize the only way to retrieve it is to "wake" him by feeding him blood. [S4E14] Down the Rabbit Hole
In a major twist, Katherine Pierce appears, posing as Elena. She ambushes Jeremy and Bonnie, using Jeremy to feed Silas and awaken him. While trapped in Mystic Falls by a spell,
After Silas is awakened, he snaps Jeremy’s neck, leaving him lifeless on the cave floor as Katherine escapes with the cure. Character Developments They find the cure fossilized in Silas' hands