"Walnuts & Rain" is an episode featured in which season of the American animated television series created by Pendleton Ward and featuring characters Finn and Jake?
Adventure Time (season 6): The sixth season of "Adventure Time", an American animated television series created by Pendleton Ward, premiered on Cartoon Network on April 21, 2014 and concluded on June 5, 2015. Adventure Time (season 6):  The season follows the adventures of Finn, a human boy, and his best friend and adoptive brother Jake, a dog with magical powers to change shape and size at will.
i don't know