Adventure Time Season 8 Episode 21 - Islands Part 2: Whipple the Happy Dragon Episode Title:Islands Part 2: Whipple the Happy Dragon.Episode Description:Finn, Jake, and Susan encounter a sea dragon named Whipple (voiced by Josh Fadem) who turns out to be rather annoying. BMO, who stowed away on their boat, angrily tells Whipple off. BMO summons a storm and destroys their boat forcing Jake to fill in. Jake begins to hallucinate his parents after a species of jellyfish latch onto him, but Finn and Susan are able to fight them. After Jake complains about wanting to return home, Finn reveals how important this trip is to him. Whipple overhears Finn's lament and uses his powers to blow the group over the dangerous waters.