We have it on good authority that the latest season of television’s greatest-ever mystery show will be “damned entertaining,” but don’t take it from creepy Ben Linus or all those Internet spoil-makers — take it from us, huge Lost nerds! Last we remember, we experienced the mind-blowing revelation that the flashback to a pill-popping, bearded Jack was in fact a flash-forward to a post-island future! Thursday’s premiere will take the future glimpses even further — and begin to deliver us from this pleasure prison of bewilderment to the shores of understanding.