Science Ninja Team Gatchaman

Mortal Combat! 5,000 Fathoms Under the Sea (1x78)

Air date: Mar 24, 1974

A research institute for the Earth's crust, which is located at the bottom of a deep sea canyon 10'000 meters below sea level, breaks off a connection. Ken and Joe go to the research institute in "Marin Saturn" in order to investigate.