Koby helps Hot Shot to train for the gruelling next leg of the Speed Planet Cup, while Optimus Prime and Vector Prime answer a distress call from the Jungle Planet.

Hot Shot takes a dangerous gamble in the next round of the Speed Planet Cup, while Sideways tries to pit the Autobots against the Decepticons against each other...

After the terrible injuries sustained in the last race, Hot Shot cannot finish the final race on his own... Leaving Koby to enter the tournament as Hot Shot's driver.

Scourge and Optimus Prime battle each other for the Jungle Planet Cyber Key with Override from Speed Planet and Lori from earth being the guest viewers.

In an attempt to confuse the Decepticons, Optimus makes duplicate cyber keys for each Autobot. Meanwhile Dr. Suzuki makes an amazing discovery at the North Pole.

Just as all hope is lost, the light of Primus shines down on the fallen Autobot warriors (Scattershot, Red Alert, and Hot Shot) and resurrects them.

A three-way battle unfolds between the Decepticons, the Autobots, and Starscream's forces. Then, an Autobot warrior named Wing Saber appears.

With the Autobots closing in, Starscream unleashes the Omega Lock's power and grows to a tremendous size. Meanwhile, the Cybertron Defense Team is sent to check on Cybertron, but they find it infested with hundreds of spider-like transformers called Scrapmetal drones.

Override, EVAC, and Leobreaker are sent to help the Cybertron Defense team on Cybertron. Megatron's Decepticons follow as well as Thunderblast who joins Megatron. Optimus and Wing Saber combine and overpower Starscream.

The Autobots are finally able to destroy Megatron. They then try to revive Cybertron using the Omega Lock, but it triggers a reaction that seemingly begins to tear apart the planet!

The true form of planet Cybertron is revealed as the planet sized transformer, Primus. Jolt is used as the device to connect and relay the messages of Primus, who begins to speak of things that have long since passed.

Jolt and the kids manage to get off a distress call, but Megatron refuses to let Optimus out of battle forcing Vector Prime to lead the rescue team with one big question: will they arrive on time?

Primus tries to use his spark energy to stop the black hole but Starscream interferes by throwing himself into Primus's spark energy, this causes him to grow to planet size. He then decides to take on Primus.

The Autobots must convience giant Transformers who are only interested in building new buildings to assist them in their search for the Cyber Planet Key.

The Autobots and Decepticons finally reach the lowest depths of Giant Planet. Coby and Landmine head to the spaceship Lemuria where the Planet Key is located. Meanwhile Galvatron arrives and confronts Optimus, who is doubting himself after the defeat of the Cybertron Defense Team.

Starscream and Galvatron battle for possession of the Omega Lock and the four Planet Keys. Though the Autobots try to intervene, Soundwave and Sideways get in their way and hope to see the battle through to the end.

Bud is taken into space so he can see what the Earth is really like, but trouble occurs when he and Scattershot must be saved while the others are fighting against Thundercracker and Starscream. Meanwhile Red Alert and Hot Shot try to remain hidden on the Race Planet while Megatron reveals himself to Override.

The Autobots join Vector Prime to search for the Omega Lock, while Overhaul is left stranded by a surprise attack by Megatron and Starscream.

Overhaul and Megatron try to convince inhabitants of the Jungle Planet of their 'good' intentions, while the Autobots investigate the appearance of a new Atlantean symbol.

As the race for the Speed Planet Cup continues, Hot Shot teaches Override the Autobots' code of honour, while Overhaul faces Scourge on the Jungle Planet.

Bud, Lori and Koby encounter government scientist Professor Suzuki while investigating strange phenomena at the North Pole, while Starscream plans a new attack.

Leobreaker disobeys Optimus' direct orders and attacks Scourge. Although Scourge now respects Leobreaker, the incident has caused a rift between him and Optimus...

Starscream unleashes the ancient Decepticons in an attempt to find Earth's Cyber Planet Key, Optimus leads the Autobots in battle...

The Minicons rescue the kids from the military, while Sideways learns the location of the Autobots' Earth base and leads every Decepticon to Coby's home town...

The Autobots search for Jolt and the kids who have been kidnapped by Sideways and Starscream, but Megatron has discovered new information regarding Unicron's dark power that could alter the effects of the war.