I became aware of this show through a piece of swag my wife brought home from a TV conference a couple of years ago,
Having caught up a bit now, I have to declare the show MANDATORY watching for any OSR roleplayer, especially if your tastes run a little gonzo. Each episode revolves around Finn, last human in the Land of Ooo and his magical dog, Jake as they have a seriously surreal adventure. A GM you can't pick out a good idea or two to use in their game is not paying attention. Already I've got notes in binder on how to use things like;
The Wall of Flesh
Crystal Guardians guarding a crystal apple tree
A giant Lich Lord
The show's wiki is here.