Ultraman (1966)

S1E1 Ultra Operation No. 1

The inaugural episode introduces the origins of Ultraman on Earth. As he pursues the rogue creature Bemular, a devastating incident involving Science Patrol member Hayata compels the alien hero to intervene and save his life by merging with him. Consequently, Hayata becomes the human host of Ultraman, a secret unknown even to his fellow Science Patrol members. The episode unfolds with Hayata and his team grappling with the menacing threat posed by Bemular, setting the stage for an epic battle between good and evil.