Episode Overview
Title: Doomsday Island Plot: As Nelson and Sharkey conduct an aerial search for an undiscovered island, Seaview inadvertently retrieves a massive egg from the ocean floor during a standard specimen gathering. The egg soon hatches into a fully matured, orange monster that viciously attacks a crew member and wreaks havoc in the missile room, tossing Kowalski aside. When Nelson returns, he directs the crew to track down this menacing creature. Meanwhile, Crane and Kowalski pilot the flying sub to explore the vicinity but crash-land near the mysterious island. There, they encounter another orange being, a talking leader, who captures them and takes them to the creatures' headquarters. These aliens from Scorpious aim to hatch countless eggs. Can the crew thwart this invasion before these amphibious invaders conquer Earth?