S04E05: The Unbearable Blightness of Being

Dr. Blight uses her latest and most devious device to zap herself into Gaia's body and literally control the world. While Gaia-Blight wreaks havoc on Earth, the real Gaia, who has been transported into Blight's body, must convince the Planeteers to help her regain her own body and put a stop to the global destruction.