This is Why I Hate Machines

Ratchet activates Bulkhead's Space Bridge, which ends up sucking Captain Fanzone into it with Ratchet following him. They both end up on Cybertron around the time Sentinel Prime has declared a lockdown. Omega Supreme has arrived on Cybertron with Megatron, Starscream's head, and Lugnut. Thus, Shockwave (still possessing Ultra Magnus' hammer) attempts to get Omega Supreme's access codes from Arcee herself instead of Ratchet to reprogram Omega Supreme. In the end, Ratchet caught Ultra Magnus' hammer, Jazz joins Optimus Prime's team, and Arcee was shown to have her memory back.

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S03E12 - Endgame (1)