Ultra Q: Dark Fantasy (ウルトラQ dark fantasy Urutora Kyū: Dāku Fantajī) is a 2004 production, and the 17th installment in the Ultra Series that was broadcast in Japan in 2004. It is a sequel to Ultra Q, the first of the Ultra Series. It retains the same swirling effect for the titlecard, but with the words "Dark Fantasy" added underneath, the title also remains black and white. It was a late night show, airing at 1 am.
- Goichi Sakamoto (Yoshihiko Hakamada): A journalist for Global Magazine's subdivision, MIND Magazine. It covers everything, including the paranormal. Though he is considered eccentric, he is an expert journalist and is good with computers. Ever since he first joined, the magazine's sales have increased at an astronomical level. He was formerly a student of Watarai, and still retains contact.
- Ryo Kusunoki (Kumiko Endo): A 25-year-old freelance photographer who also works for MIND. Though she appears to hate Goichi, she actually respects him a great deal.
- Kakunoshin Watarai (Masao Kusakari): A 54-year-old inventor, and a professor of science at Teito University. He spent some years in Britain, where he found his craving for biscuits and tea. He is knowledgeable in many topics, especially science, history, mythology, and folklore.