Contest Winner Cameo: Episode 34 "The Life that Can't be Forgiven" was the winner of a script-making contest held by Tsuburaya Productions. Its creator, Shinichiro Kobayashi, would later create a similar script for an identical context held by Toho Studios in the 1980s, resulting in Godzilla vs. Biollante.
Originally, Eiji wanted the show to be a revival of the original, with the original Ultraman returning to Earth and Hayata reclaiming his identity as Ultraman, however Hajime scrapped these plans. It made more sense from a merchandising standpoint to create a new hero.
Black King was intended to be the brother of Red King and would have used the same suit.
Written by Cast Member: Shin Kishida, who played Ken Sakata, wrote Episode 35 (the one with Priz-Ma), which probably explains why Ken plays such a large role in the episode.