What is the name of this American animated television series produced by Disney Television Animation whose 18th episode premiered in June, 2013?
Land Before Swine:  It premiered on June 28, 2013. Gravity Falls: Gravity Falls is an American animated television series produced by Disney Television Animation originally for Disney Channel (and then later for Disney XD) from June 15, 2012 to February 15, 2016.
i don't know