Knock Out and Starscream experiment with synthetic lead and threaten to take over the Deceptacon ship and unleash an old enemy.

While Optimus struggles to survive after Megatron’s destruction of the Autobot base, the separated members of Team Prime try to reconnect.

The Autobots search for signs of each other, but start to lose hope while the Decepticons welcome a key player to their ranks. A win for Wheeljack may ultimately lead to an Autobot defeat.

The Ultimate Autobot Hunter is unleashed on our heroes.

Led by a new member, Team Prime launches a desperate assault on the Decepticon citadel.

The Decepticons launch a new scheme to clone an army of beasts.

As tension builds within the Wreckers, they find themselves confronted with the return of the Predacon.

Unlikely duos team up, including Acree and Wheeljack, and Agent Fowler and Jack's mom.

Megatron doubts Predacon and its allegiance after Predacon reveals a secret of its own.

Soundwave is captured by the Autobots; Megatron revives an old plan.

While Optimus faces off with Predaking, Megatron mounts a campaign to form a new alliance.

Ratchet finds himself in a series of predicaments as he resumes his experiments on Synthetic Energon.

The Autobots face the Decepticons for a final showdown.