Operation: Bumblebee, Part 1.The hunt begins for ancient Cybertronian relics hidden on Earth. One such relic is unearthed by Megatron and the Decepticons, which is revealed to be the Spark Extractor during the ensuing conflict. Later, while investigating an energy signature which could be another relic, Bumblebee is ambushed by M.E.C.H., who knock him out and steal his T-cog (the device that enables Transformers to scan alternate modes and transform). Left unable to transform into vehicle mode, Bumblebee has no choice but to stay at base. Dissatisfied with that option, he and Bulkhead secretly investigate another energy signature, which leads to an escaping Knock Out and Breakdown, the former of which had just acquired a relic from a cave, the Shield Generator. An improvised chase follows. Meanwhile, Starscream approaches Silas (the leader of M.E.C.H.) and offers advice and knowledge on Cybertronian anatomy.