Episode Overview
The Defenders head to Alaska to investigate a dinosaur alert. While tracking dinosaur footprints, Rick and L.J. stumble upon a dormant volcano that has an artificial dome covering it and is inexplicably heating up. Meanwhile, the senior Defenders and Jedda spot Ming and Garax, just as the group comes under attack by two Allosauruses. After a close escape into a mountain cave, they uncover Ming's sinister plan—he's used an earth drill to thaw out countless prehistoric creatures trapped in the tundra, unleashing them to wreak havoc on Earth's cities! The young Defenders manage to operate Ming's drill and blow up the drilling station. The volcano erupts, destroying the dome and returning the arctic climate, which ultimately devastates the Valley of the Dinosaurs.