Finn the Human is going looking for his dad on Adventure Time, and apparently the half-hour episode is going to involve a lot of surreal characters, plus the return of Prismo, the wish-granting guy. And this promo, featuring Harry Chapin's "Cat's Cradle," will hit you right in the feels.

Adventure Time starts its sixth season on April 21, at which time we'll finally learn why Finn's dad is such a deadbeat.