Home Is Where the Spark Is

The Autobots continue to defend the city while making their home in the abandoned automobile plant Sari set them up in. Sari uses her key to accidentally revive Megatron's head, who promptly learns of Starscream's betrayal. Megatron controls a small "Pocket-Bot" to search for the AllSpark in the Autobot's base, but when he doesn't find it, he takes control of the machinery in the plant to kill the Autobots. The Autobots hold their own and emerge victorious, and ponder who could have controlled the "Pocket-Bot" in the first place.