Babel II - Season 1 Episode 22 Deep Sea Crab Robot
Overview: The construction plan of a seabed city that was underway on the seabed of the Sea of Japan. However, Yomi, who already had an undersea base, sent a huge crab robot and destroyed the base under construction. Babil II, who reunited with the Chief Security Bureau, begins to take action to defeat the crab robot and remove Yomi's interference.