The evil Decepticons have appeared in Detroit.

While working on a space bridge, the Autobots and their leader, Optimus Prime, find the AllSpark.

Optimus Prime and the Autobots continue to fight off Megatron and the evil Decepticons.

The Autobots must save Detroit from Starscream.

Optimus Prime and the Autobots set up base at an old auto-parts shop.

An engineering genius tampers with Bumblebee's system and causes him to become Meltdown.

Professor Sumdac's latest creations begin to think for themselves.

Ratchet thinks back on the time that he spent in the Autobot-Decepticon War.

Bumblebee faces off against the newest villain, Nanosec.

Bumblebee and Bulkhead are having fun celebrating their first-ever Halloween with Sari.

Bulkhead realizes that Sari's newest toy is really evil. Unfortunately, none of the Autobots believe him.

The Autobots go face to face with two new Decepticons, Lugnut and Blitzwing.

Sari is kidnapped, and the evidence points to the Dinobots.

One of Sumdac's ex-workers takes control of an Autobot. He then takes the Autobot out on the town.

Prowl, Bumblebee and Sari head into the forest to find the source of mysterious Cybertronian energy readings.

Starscream, Lugnut and Blitzwing begin their invasion of Earth.