Question: "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?
Sentence (from "Walnuts &amp; Rain"): The episode was written and storyboarded by Tom Herpich, from an outline by Herpich, Adam Muto, Kent Osborne, Jack Pendarvis, and Pendleton Ward.
Relevant evidence: No