Fire In The Sky
The Decepticons are plotting to drain the Earth's energy through a crystal at the North Pole. They discover a Transformer, Skyfire, buried in the ice and revive him. Skyfire, a scientist, crash-landed on Earth before the Autobot ship crashed during a survey mission with Starscream. He allies himself with the Decepticons because of Starscream, and takes Spike and Sparkplug prisoner, being too powerful for the Autobots to stop. However, when he sees how Megatron treats his human prisoners, he changes sides. The Decepticons are defeated, but only at the cost of Skyfire, who ends up frozen in the ice once again.