The Autobots find the Allspark and the Decepticons try to seize it.

The battle continues; Sari Sumdac discovers the Autobots and the Allspark.

Starscream captures Bumblebee and a number of civilians in an attempt to obtain the Allspark.

The Autobots find that their new base on Earth is already inhabited.

A bioengineering genius experiments with some of Bumblebee's hydraulic fluid.

Megatron reprograms Professor Sumdac's animatronic dinosaurs, turning them into Dinobots.

Ratchet's old enemy, the bounty hunter Lockdown, resurfaces.

Bumblebee springs into action when Megatron unleashes a speed demon and sends it on a crime spree.

Blackarachnia confronts Bumblebee and Bulkhead as they are celebrating their first Halloween.

Bulkhead is suspicious of the musical robot player Sari receives as a birthday gift.

Blitzwing and Lugnut come to Earth to help Megatron get the Allspark.

When Sari mysteriously disappears, Prowl and Bulkhead go searching for her on Dinobot Island.

A disgruntled former employee tries to use an Autobot to destroy the city in a bid for revenge.

Prowl, Bumblebee, and Sari investigate a Cybertronian energy signal detected by Optimus Prime.

Starscream, Lugnut and Blitzwing invade Earth; Optimus Prime makes Sari turn over her Allspark key.

The Autobots must rally to prevent the AllSpark from falling into the clutches of the Decepticons.

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.

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.

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

Bumblebee competes against the Decepticons in an underground racing competition.

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

Prowl and a mysterious Decepticon bounty hunter go after Starscream.

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.

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.

The Autobots try to warn Cybertron of Megatron's spy.

Megatron and the Decepticons focus on conquering Cybertron.

One Autobot has suffered severe damage.

Bulkhead confronts Dirtboss and the Constructicons.

Wasp travels to Earth to exact his revenge on Bumblebee.

Sentinel has success in capturing fugitive Decepticons.

Blackarachnia is desperate to find Wasp before the Autobots.

Soundwave action figures are sold for Christmas.

The Elite Guard heads back to Cybertron with prisoners.

Ratchet and Captain Fanzone are catapulted to Cybertron.

Ratchet is determined to go to the moon to save Omega Supreme.

Prowl and Optimus Prime are on the defensive when Lugnut's clones attack Detroit.