Episode Title:Ghost Fly.Episode Description:During a dark and stormy night, Jake kills a fly that eats some of his soup. In retaliation, the vengeful soul of the fly haunts the tree house. Finn and Jake attempt to get Peppermint Butler to exorcise the fly's spirit, but he leaves out of fear. After failing to adhere to proper exorcist protocol, Finn is turned into a fly. Jake gets BMO to karate chop his heart, allowing him to fight the fly on its own plane of existence. After a struggle, Jake kills the fly's spirit and is brought back to life.