While heading for Bermuda, Captain Noah and the thunder team discover the death force have enslaved the remaining human survivors of the Gotham invasion and they plan a rescue mission.
While on their way to the Gilbert islands, the Thunder team discover the death force has constructed an elevator that can reach as high as the terror star.
In an attempt to make repairs to the Thundersub after the attack on the death force orbit elevator, Captain Noah and the thunder team change course to Antarctica.
The Thundersub crew becomes stricken with food poisoning caused by a red tide. deployed by the death force and Anna and Sarah both try to find the antidote.