Doc Terror attacks a solar power station in Australia, but is soon defeated by the Centurions. Frustrated by the Centurions constant meddling, Doc Terror hatches a plot to take control of Sealab - the Centurions' weapon supplier. Under attack from Terror's evil droids and his new sub-aquatic creation Mako, Jake comes up with an idea to repel the intruders using Sealab's highly intelligent dolphins. The plan works, but the Centurions soon find themselves dealing with an even bigger problem than they imagined when Mako awakens Terror's Cyber-Squid... Science Lesson: Ocean bed by Max.