- Otaku O'Clock: Being aimed at adults, Dark Fantasy was aired at 1:00am on TV Tokyo.
- Prop Recycling: Garagon's face was later modified for that of Pigmon for the little monster's reappearance in Ultraman Max
- Retroactive Recognition:
- Captain Hijikata's actor Kai Shishido appears in "Who Are You?"
- Ren Senjyu's actor Masato Uchiyama is the love interest of Tachibana in "The Eyes of the Totem", while Jun Himeya's (Yusuku Kirishima) appears in "The Quiet End". And to top it off, Masami Horiuchi is Kadono in "Hitogata" and later Commander Matsunaga in Nexus.
- Lily's actress reappeared in Ultra Galaxy Mega Monster Battle as Karen.
- Komachi, the titular girl of "The Town Beauty", may be better recognized by most as Nanami/Hurricane Blue, but she would later reappear in Ultraman Max as Natsumi, the Girl of the Week in the two-part story "The Daughter of Zetton" and "I Love King Joe".
- Shiro Sano is The Narrator for this series, and would later do it again on Ultraman Max.
- What Could Have Been: This series was part of a major project to reboot the Ultra Series into a more mature franchise, which also included Ultraman Nexus and Ultraman: The Next. Due to Nexus being Screwed by the Network though, this ultimately never came to be.
Trivia / Ultra Q Dark Fantasy