Then: Nestor Carbonell as Richard Alpert
On an island of pure mystery, Richard Alpert was undoubtedly one of the most mysterious individuals. We first met Richard off the island in 2001 when he was trying to recruit Dr. Juliet Burke to join Mittelos Bioscience. We later see Richard come face-to-face with a young Ben Linus, appearing the same as when we first saw him — but nearly 30 years before he met with Juliet. 60 years before he met with Juliet, Richard encountered John Locke — once again, appearing to be the same age as he was in 2001. As it turns out, the leader of the Hostiles allowed Ben Linus to join his people in exchange for helping exterminate the Dharma Initiative.
As the series went along, we learned that Richard had originally arrived to the island as a slave aboard the Black Rock — in 1867. After the Man in Black freed Richard and subsequently asked him to kill Jacob, Jacob beat Richard into submission and instead persuaded him to join his cause. In exchange for being Jacob’s top lieutenant, Richard was given the gift of immortality. It wasn’t until both Jacob and the Man in Black died that Richard began to age normally.
Image Source: Lostpedia