Episode Title:
Endgame, Part 2.
Episode Description:
The three Lugnut Supremes touch down on Earth and launch a full-scale assault on Detroit. While Optimus Prime and Prowl fight the Lugnut Supremes and take one down, Ratchet, Bulkhead, Bumblebee, and Sari head to the moon to rescue Arcee and reactivate Omega Supreme. Starscream then takes over the remaining two Supreme clones and initiates their self-destruction. Prowl begins to gather the AllSpark fragments to block the explosion, including the one in Starscream's forehead, which takes him offline for good.
