1) I didn't watch anything from last season after the halfway point, and was only very vaguely aware of happenings via fannish osmosis, so it was like a cavalcade of "Ollie did what? Wait, Ollie did WHAT?"
2) My line of work doesn't interfere with my suspension of disbelief for genre shows all that often, but are they trying to say that they built a high-speed rail line in six months? Because, no.
3) Speaking of. Aren't there people on that train, Ollie? The one you just blew up? Unless the theory was that the train... didn't have any passengers on it... because... trains do that...?
4) Oh, screw you and your "six months later," show. I was permanently soured on that gambit by Battlestar Galactica and I am not interested in playing the "SOMEONE will DIE!" game for an entire season.