The Autobots try to stave off an attack from Megatron's Terrorcons to protect their human wards.

Bulkhead awaits a visit from his buddy Wheeljack, but his arrival does not go as planned.

A Decepticon plague infects Optimus Prime, so Arcee and Bumblebee sneak onto the Nemesis to find the cure.

MECH agents capture a Decepticon, and the Autobots mount a rescue.

The Autobots go to the Earth's core to fight for the planet; and Jack uncovers info about Optimus' background.

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.

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

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

The Autobots face the Decepticons for a final showdown.