Ever since November, Gravity Falls fans have been waiting for the conclusion to "Weirdmageddon" and the series as a whole. Now, at long last, that time has finally come and brought with it laughs ...

That's because straight through to the end, Gravity Falls never lost sight of its central theme: Growing up is tough, but it's also inevitable.

'Gravity Falls' stars Jason Ritter and Alex Hirsch talk "Weirdmageddon," Louis C.K.'s guest role, and the possibility of a 'Rick and Morty' cross-over In the multi-part story, 'The stakes are ...