Transformers: Prime - Season 3

The heroic Autobots continue their secret life on Earth, working alongside three human teens while defending the planet from the Decepticons. Optimus Prime, Bumblebee, Arcee, Ratchet, Bulkhead and the rest of Team Prime face a growing threat as Megatron returns with a mysterious and dangerous element, forcing the Autobots to prepare for their toughest battle yet.