Remember back for the promo for One of Them, they showed a different countdown clock than the one in the hatch? At least, I think that's what it was... people on here were trying to figure everything out.
Maybe it was supposed to be in the episode but got cut or something. Or perhaps the producers are just trying to make us all angry, rabid fans. My vote is for the latter.

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"To be a genius is to be misunderstood..." -Ralph Waldo Emerson