Episode Title:Billy's Bucket List.Episode Description:Finn finds the late Billy's (voiced by Lou Ferrigno) bucket list and, to honor his memory, decides to complete it. After finishing most of the items, including taking Billy's ex-girlfriend Canyon (voiced by Ako Castuera) on one last motorcycle ride, and conquering his fear of the ocean, an apparition of Billy appears to Finn in the sky, telling him that Finn's biological father is still alive.