Fire In the Sky

S1, E13: The Decepticons begin to siphon the Earth's heat from the Arctic Circle. As a result, temperatures worldwide begin to drop. But unknown to the Decepticons is what . . . or who . . . they are about to release from the ice. Skyfire, a powerful jetfighter, could be the Autobots' greatest ally or worst foe in their attempt to stop the Decepticons from instigating a new ice age.