The episode was written and storyboarded by Ako Castuera and Jesse Moynihan, from a story by Kent Osborne, Pendleton Ward, Jack Pendarvis, and Adam Muto.

In this episode, Finn finds Billy's (voiced by Ferrigno) bucket list and decides to complete the unfinished items, as a tribute toward the fallen hero.

The episode was the last to feature Castuera as a storyboard artist until her return to the series during the seventh season; in the interim time, she focused on her art career.

"Billy's Bucket List" was written and storyboarded by Ako Castuera and Jesse Moynihan, from a story by Kent Osborne, Pendleton Ward, Jack Pendarvis, and Adam Muto.

[1] This episode marked the last time Nate Cash was credited as supervising director, as he later left the series to direct the animated mini-series Over the Garden Wall.

[7][8] In addition, both comedian and rapper Andy Samberg, as well as actor Mark Hamill, reprise their roles as Party Pat and the Fear Feaster, respectively.

[12] In one of the episode's background art pieces, artist Derek Ballard inserted a buried car, homemade bombs, and a hole in the side of a cliff, additions that he claims were in honor of "one of America’s greatest film treasures: Tremors".

[15] Sava opined that, "the final minute of “Billy’s Bucket List” drops a major plot-bomb that gives the series an exciting direction for next season, and while the events leading up to the cliffhanger aren't quite as provocative or substantial as the last few episodes, they represent all the things that make this show such a great 10-minute oasis at the beginning of the week.

"[15] Sava also noted that, "Trippy psychedelia is another major ingredient of this series, and 'Billy’s Bucket List' delivers a heavy serving when Finn finds himself underwater.