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.

Scourge frees Megatron from Starscream's trap and heads toward Earth. The Autobots must deal with Megatron and locating Starscream's location at the same time.

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.

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.

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...

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.

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!

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.

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.

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.

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

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.

After the "Atlantis" ship disappeared, Optimus Prime and Megatron head to the moon where it's hiding while Vector Prime and the kids locate the Omega Lock. Will the Autobots prevent the Decepticons from getting the Omega Lock? And what does a side-changing Transformer named Sideways have planned?

Hot Shot and the Autobots battle Ransack and Crumplezone in the first round, while Starscream continues to build his forces when he recruits Mudflap and Lori and Bud uncover information on the Ancients' prehistoric visit to Earth.

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

Optimus and company rescue Bud and the Minicons, but Ransack and Crumplezone will do everything possible to prevent them from finding the Cyber Planet Key.

Landmine tries to adjust to life on Earth while recovering from the injury Starscream's null cannons inflicted on him. Meanwhile, the Autobots discover what planet the second cyber planet key is hidden on, and Hot Shot and Red Alert are sent to seek it out.

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

Optimus discovers that Hot Shot has disobeyed his orders while Red Alert has covered for him. However, he is forced to put his trust into Hot Shot to win the Cyber Key from Override.

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.

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 kids are forced to use trickery to keep Sidewways and Starscream from deleting Jolt's memory, but the Autobots are getting closer with every minute.

In order to rescue his brother, Coby decides to go to Giant Planet. But before he leaves, he tries to tell his parents about the Transformers.

The Autobots travel to the Giant Planet on the old Atlantian ship Ogygia, but in the space bridge they must face off with the very mind of Atlantis itself.