Katokutai o šucugeki sejo (E03)

An accidental explosion causes a rocket to crash into the Pacific with six atomic bombs. One explodes, causing a massive tidal wave. SSSP Agents Fuji and Hoshino spot the amphibious humanoid, Ragon, mutated into a colossus by the explosion. Ultraman defeats Ragon with his Spacium Beam. He retrieves the ordnance and saves the day. Humanity is chilled at how close it came to nuclear annihilation. (Prime Video)