Returning from the fifth season are the survivors ' leader Dr. Jack Shephard ( Matthew Fox ) ; former fugitive Kate Austen ( Evangeline Lilly ) ; millionaire Hugo `` Hurley '' Reyes ( Jorge Garcia ) ; former torturer Sayid Jarrah ( Naveen Andrews ) ; con artist James `` Sawyer '' Ford ( Josh Holloway ) ; medium Miles Straume ( Ken Leung ) ; former mob-enforcer Jin-Soo Kwon ( Daniel Dae Kim ) and his privileged wife Sun Kwon ( Yunjin Kim ) ; leader of the island 's native population , known as the `` Others , '' Ben Linus ( Michael Emerson ) ; deceased crash survivor John Locke , who lives on in the sideways timeline but has been impersonated in the original timeline by the mysterious Man In Black ( Terry O'Quinn ) ; and former islander Desmond Hume ( Henry Ian Cusick ) , who starts the season off the island .
Returning from the fifth season are the survivors ' leader Dr. Jack Shephard ( Matthew Fox ) ; former fugitive Kate Austen ( Evangeline Lilly ) ; millionaire Hugo `` Hurley '' Reyes ( Jorge Garcia ) ; former torturer Sayid Jarrah ( Naveen Andrews ) ; con artist James `` Sawyer '' Ford ( Josh Holloway ) ; medium Miles Straume ( Ken Leung ) ; former mob-enforcer Jin-Soo Kwon ( Daniel Dae Kim ) and his privileged wife Sun Kwon ( Yunjin Kim ) ; leader of the island 's native population ( known as the `` Others '' ) Ben Linus ( Michael Emerson ) ; and deceased crash survivor John Locke , who lives on in the sideways timeline but has been possessed in the original timeline by the mysterious Man In Black .