Does anyone watch Lost? Anyway, the survival of a major "Lost" character was left in doubt this week in an episode that shot adrenaline into the plot of the ABC series but failed to give it a needed ratings boost.The Wednesday episode in which Locke was shot, perhaps fatally, by Ben , the leader of "the Others," drew 12.1 million viewers. Given Locke's importance to the show, the odds seem to be in his favor. But the producers have never been queasy about killing off characters who survived the crash but not the show's complex plot twists.ABC's recent announcement that the show