
The show takes place ten years after the finale of Armada, opening in an age of peace on Cybertron and Earth which is destined not to last long. Energon pits the Autobots against an array of villains: the reborn Megatron , the barely functional Unicron, and the mysterious Alpha Q and his Terrorcon minions.

Ten years have passed since the Armada battles. The Autobots and Decepticons work side by side with humans to harvest Energon. But trouble is brewing with recent attacks by a group of transformers known as Terrorcons. Can the Autobots meet the threat?

The Autobots prepare for the Terrorcons' second strike, but it's not where they expected.

At Desert City, the Autobots fend off the first Terrorcon attack against Earth.

The survivors on Mars are attacked again, but the Autobots must turn their attention elsewhere.

An Energon scout team on a frozen mountain is the target of the latest Terrorcon attack!

At various Cyber Cites the Transformers have set up defensive traps to stop the Terrorcons from stealing Energon. It appears the Autobots have won as their enemies retreat, but as they head back to regroup, Cyclonus, Tidal Wave and Scorponok begin to bicker around Megatron who still lies in his coma. Suddenly, he begins to come to life. Scorponok is outraged at this and whines to Megatron about him stealing all the Energon for himself.

After seeing what Megatron did to Hot Shot, the Autobots end up in a stand off with the Decepticons. Megatron taunts Optimus Prime but allows the Autobots to withdraw without a skirmish. Back at Ocean City, Hot Shot is lowered into an Energon pool for repairs while the Omnicons begin making duplicates of Megatron’s sword. A space bridge is detected near the city and the Autobots fly into action.

A mysterious phantom assassin stalks Optimus Prime. Can Kicker and the Autobots protect Optimus and unmask the assassin before it is too late?

The Decepticons manage to hit Asteroid City and Lunar City at the same time.

The remains of Unicron are finally shown and then the Decepticons attack ocean city only to discover that the Autobots have an Energon tower which activates during the battle. The Energon tower destroys all the Terrorcons and injures for the Decepticons, forcing Megatron to retreat.
Available on: TV Tokyo, TV Aichi, TVQ, TV Osaka, TVh, TSC