G.I. Joe: The Movie.While Cobra Commander and Serpentor blame each other's leadership of Cobra as the root cause of the organization's failures, Pythona, a woman from the secret civilization of Cobra-La, infiltrates the Terror Drome. While there, she reveals to Serpentor that Cobra-La was responsible for planting the idea in Doctor Mindbender's mind to create Serpentor. At her urging, Serpentor plans to capture G.I. Joe's latest weapon—the Broadcast Energy Transmitter (B.E.T.). Cobra assaults the Joes as they test the B.E.T. in the Himalayas. The Joes use the B.E.T. to activate their automated weapons systems. Serpentor is captured and Cobra Commander orders a retreat. Cobra Commander leads his troops into Cobra-La. As the Joes celebrate their victory, a new group of rookie Joes are brought onto the team, including the unlucky kunoichi Jinx, military police officer Law and his dog Order, former basketball player Big Lob, EOD specialist Tunnel Rat, covert operative Chuckles, and Duke's reckless half-brother, the green beret Lt. Falcon. In Cobra-La, the Joe forces are ambushed and detained within the Lovecraftian living environment. The Cobra soldiers are met by the civilization's ruler, Golobulus, who has Pythona and his other henchman, Nemesis Enforcer, arrest Cobra Commander. While there, Cobra learns about their history: 40,000 years ago, Cobra-La was an ancient civilization that ruled Earth. However, the Ice Age, the evolution of humans and their development of scientific technology resulted in Cobra-La's survivors being forced into caverns within the Himalayas. Cobra-La rebuilt their society in secret as centuries passed. Golobulus vowed to destroy humanity so that his people could re-claim the earth. He eventually discovered a nobleman who was working on biological weapons. The nobleman later became Cobra Commander, charged with conquering the world for Cobra-La. However, Cobra Commander's repeated failures caused Golobulus to use a Psychic Motivator on Mindbender to create Serpentor...