The Autobots find that their new base on Earth is already inhabited.

A disgruntled former employee tries to use an Autobot to destroy the city in a bid for revenge.

Optimus teams up with Sentinel Prime in order to defeat the Headmaster.

While chasing an Autobot traitor, Bumblebee thinks back on the time he spent with Bulkhead in the Autobot Boot Camp.

The Elite Guard heads back to Cybertron with prisoners.