sentences:  When Sun and Lapidus tell Ben Linus that they were told to wait at the Barracks by Christian, Ben has an alarmed look on his face, but does not elaborate.In the episode "The Last Recruit," the Man in Black reveals to Jack that he had been impersonating as his father in a similar way to how he now impersonates Locke and how he impersonated Mr. Eko's brother, Yemi, revealing that at least some, if not all of Christian's appearances on the island post-death were the Man in Black.In the series finale, Jack meets Christian again in what is believed to be an alternate timeline in which Oceanic flight 815 never crashed, and in which many characters regain memories of their original island lives.