“Revenge of The Decepticons Part 5: The Demolished Man”
Optimus goes to confront Megatron, as Megatron surrenders himself voluntarily to the Autobots after being assaulted and barely damaged by a surprise attack from one of Skywatch's 'special' satellites. Megatron then reveals to Prime that Spike isn't who he seems to be as an Autobot ally, and has him covertly investigated by Prowl after Megatron reveals Spike killed Scrapper, and he's leading the Autobots to destruction by believing in the humans.