LOST - "LA X" - "Lost" returns for its final season of action-packed mystery and adventure -- that will continue to bring out the very best and the very worst in the people who are lost -- on the season premiere of "Lost," TUESDAY, FEBRUARY 2 (9:00-11:00 p.m., ET) on the ABC Television Network. On the season premiere episode, "LA X" Parts 1 & 2, the aftermath from Juliet's detonation of the hydrogen bomb is revealed. (ABC/MARIO PEREZ) FOREGROUND: YUNJIN KIM, JEFF FAHEY; BACKGROUND: NESTOR CARBONELL, ZULEIKHA ROBINSON, BRAD WILLIAM HENKE