RTD, you magnificent bastard. Rex becoming immortal goes against all previous canon, against what I believe was said in Miracle Day about Jack's blood not causing immortality, and just flat out trolls the fandom.
I'll be honest, I cracked up. Well played, sir.
That said, the finale wasn't quite as intense as I hoped. Since there's no set plans for another season, I kind of hoped they'd kill of Jack. Should have known. Not going to go in depth about it now, but I did like the series. Just not as awesome as I'd hoped.