Summary: A meteorite with alien life on its surface falls into the Arctic Ocean. Doc Terror wants it, and sends Mako to retrieve it. Sealab is also interested in the meteorite, and comes into conflict with Terror's forces. The Centurions are sent to diffuse the situation. However, problems later arise when the new Mark-1 A.I. Prototype onboard is infected by an alien virus carried by the meteorite. With every electronic system on board Sealab affected, the Centurions have to neutralise the virus before Doc Terror's approaching forces arrive. Science lesson: "The Arctic Ocean" by Max.