Monday, February 15th (7:00 p.m., ET/PT) on Disney XD. Why the Hell it didn't air last year is quite simple. Disney XD needs some sort of ratings in February and with simply nothing in its line-up the Gravity Falls finale has to pay. Or really just human stupidity, I mean why they wouldn't keep the momentum of three episodes that are suppose to be seen together is just stupid. Animation was way done.
Remember to love the show, not the network it was on.
