Originally Posted by Syberz

Am I the only one who thinks that Henry isn't one of the Others but actually something else?

Also, I think that the blast doors are on a timer, they're designed to come down at a specific time and for a specific amount of time. The idea is to lock the hatch dwellers inside while supplies are parachuted outside, that way it assures no contact between the hatch dwellers and the people in charge of the Dharma project.