Dr. Jack Shephard is a fictional character and the protagonist of the ABC television series Lost. It happen in 3 session, before he get back to island. He really want to get back to island. He have a lot of regrets, especially about Locke. He ruin his life. He alcohol and drug addict. He have vision of his dead father before. He used to date Kate and be like father to Aron. He on his way to become man of faith and stop being man of science. He suicidal. He heroic. He doctor. He brave. He good 