Poison Scorpion Man (Kaijin), Gadoras (Kaiju), Sasori Gadoras (Combined Form): Takeshi Miyazaki ( 宮崎剛, Miyazaki Takeshi).Kamen Rider 1: Hiroshi Maeda ( 前田浩, Maeda Hiroshi).Ultraman: Toshiyuki Kikuchi ( 菊地寿幸, Kikuchi Toshiyuki).
Producer: Hiroshi Butsuda ( 佛田洋, Butsuda Hiroshi).The short, with the exception of the narrator and some background extras, featured no face or voice actors, only suit actors, and only used recycled soundbytes for both the voices of Ultraman and Kamen Rider 1. Combining their powers, the two were able to successfully destroy the monster. Kamen Rider 1 is then able to grow to an enormous size to fight alongside Ultraman. Ultraman experiences trouble and calls for Kamen Rider 1's help. When the two monsters are nearly defeated, they merge into a more powerful kaiju Sasori Gadoras. The main characters, Ultraman and Kamen Rider 1 appear on the scene separately, each fighting an original kaijin and kaiju, Poison Scorpion Man and Gadoras respectively. The final segment of the special is the short film "Super Battle: Ultraman vs Kamen Rider".
Interspersed among the many clips are interviews with Hiroshi Miyauchi, who played Shiro Kazami in Kamen Rider V3, and Kohji Moritsugu who played Dan Moroboshi in Ultra Seven. (such as various Kaijin grunts, growls, and other sounds, characters acting silly, and other funny moments.) "!?" is a humorous segment examining some of the more wacky and oddball moments of the various shows.Henshin" shows the different transformation rituals of the Ultra Brothers and Kamen Riders. Kaijin”, in which the many giant monsters (kaiju), and humanoid monsters (kaijin) that have been fought over the years are shown. Cyclone”, which spotlights the many jets, tanks and other vehicles used in the Ultra Series, and the different motorcycles ridden by the Kamen Riders.
The Rider Kick”, which showcases the various attacks and finishing moves of each character. The special is an in-depth retrospective of the two franchises, making comparisons between the different characters, their weapons, powers and so forth.