G.I. Joe: The Revenge of Cobra Episode 4 Battle on the Roof of the World Episode Title:The Revenge of Cobra, Part 4: Battle on the Roof of the World.Episode Description:On the Island of No Return, Spirit saves Storm Shadow from drowning while escaping from an underground river. In return for his heroism, Storm Shadow allows Spirit to keep the fragment. Flint, Lady Jaye, Snow Job, Spirit, Gung-ho and Shipwreck head to the North Pole to retrieve the third fragment, "The Laser Core", and are opposed by Destro and Zartan. But Zartan finds the third fragment, and he blackmails the Joes and Cobra that the final fragment will belong to the highest bidder.