Ultraman: S1 E20 - Terror On Route 87 Ultraman
A boy showed up to the headquarters of SSSP one day after the mysterious phenomenon occurred at Omuroyama in Izu. He told Fuji that Highland Dragon Hydra of Mt. Omuro Park would rage, and he went away. While SSSP investigates the vicinity of Mt. Omuro, the identity of the boy was revealed, and surprisingly he was the person who died in a traffic accident six months ago. And as the boy's warning, Hydra appeared!