 "Sons of Mars" was written and storyboarded by Jesse Moynihan and Ako Castuera, from a story developed by series creator Pendleton Ward, Patrick McHale, Kent Osborne, Moynihan, and Doug TenNapel.TenNapel had previously written the storyboard for the scrapped first season episode "The Glorriors".The reason he was credited for "Sons of Mars" was because the scene featuring Lincoln interacting with Death was very similar to a scene he boarded in a scrapped season one episode.