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

Unaware of the Decepticon activity, the Elite Guard take Optimus Prime and the Autobots back to Cybertron.

When the AllSpark turns construction vehicles into Autobots, Bulkhead becomes fast friends. However, the Decepticons have other plans in mind.

The second-rate villains of Detroit team up to beat the Autobots.

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

Optimus Prime and his band of Autobots are taken off the job when the Cybertron Elite Guard, led by Ultra Magnus, comes to Earth looking for the AllSpark.

The AllSpark creates a new Autobot out of pieces of garbage.

Bumblebee competes against the Decepticons in an underground racing competition.

Prowl and a mysterious Decepticon bounty hunter go after Starscream.

Unlikely matchups! It's Optimus Prime and Dinobot Grimlock vs. Blackarachnia and Meltdown.

Sari has to defend the Autobot home base from invading Constructicons.

Megatron captures Bulkhead in order to take over Cybertron.

The Final Battle! It's Optimus Prime and the Autobots against Megatron and the Decepticons in a fate to save both Earth and Cybertron.