Ultraman (1966)

S1E33 The Forbidden Words

Hayata and his fellow members of the Science Patrol find themselves ensnared by the sinister alien, Mefilas. In a shocking twist, Mefilas transforms Fuji into a colossal monster for a short time. To further complicate matters, he resurrects doppelganger versions of Ultraman’s notorious foes: the Baltan Alien, the Kemurian, and the Zarab Alien, bringing chaos and danger to their already dire situation.