 The series follows the adventures of Finn ( voiced by Jeremy Shada ) , a human boy , and his best friend and adoptive brother Jake ( voiced by John DiMaggio ) , a dog with magical powers to change shape and grow and shrink at will . In this episode , Finn and Jake stumble into two different holes and meet two different fates : Finn becomes the guest of the unstable King Huge ( voiced by Jones ) , who insists that Finn remain with him and stare at his idiosyncratic cuckoo clock ; whereas Jake meets Seven ( voiced by Isaak ) , a bear whose makeshift air raft has been falling down the hole for years . Eventually , it turns out that the hole Jake and Seven are falling through is the chimney to the kitchen where Finn is being held captive . As such , Jake is eventually able to save Finn . 
