Ultraman (1966)

S1E24 The Undersea Science Base

The inauguration of the Science Patrol’s latest undersea research facility takes a disastrous turn when a mutant Narwhal wreaks havoc, compromising the base's air supply. With time running out, Hayata and his team embark on a perilous mission to rescue those trapped inside while evading the creature's lethal assaults. As tensions rise, the team must work together to outsmart the beast and ensure everyone's safety.