"Return to the Nightosphere" and "Daddy's Little Monster" are the fifth and sixth episodes of the fourth season of the American animated television series Adventure Time. "Return to the Nightosphere" was written and storyboarded by Ako Castuera and Jesse Moynihan, whereas "Daddy's Little Monster" was written and storyboarded by Rebecca Sugar and Cole Sanchez. Both episodes' stories were developed by series creator Pendleton Ward, Patrick McHale, and Kent Osborne. Originally airing on Cartoon Network on April 30, 2012, both episodes feature the return of Martin Olson as Hunson Abadeer.