S4, E13: Shane (recurring guest star David Alpay) leads an expedition to a desolate island off the coast of Nova Scotia, where he believes the secret of the cure lies hidden. On the trek to the island’s interior, Rebekah (recurring guest star Claire Holt) and Elena continue their bitter rivalry, Stefan does his best to keep the peace and Damon accuses Shane of leading them into a trap. Bonnie and Jeremy try to figure out the message of the Hunter’s mark, while Shane reveals more of the legend of Silas and the witch Qetsiyah, along with his own personal history. Back in Mystic Falls, Tyler confronts Klaus, and Caroline is caught up in the violence that follows.