Lost

Season 6, Episode 9

Episode Title: Ab Aeterno

Air Date: 2010-03-23

Overview:

Richard Alpert's back story is shown: In 1867, he is brought to the island on the Black Rock as a slave. He makes a deal with Jacob to be his representative in exchange for immortality. In the present day, Hurley convinces him to help the candidates replace Jacob and stop the Man in Black from leaving the Island.