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

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

The Final Battle! It's Optimus Prime and the Autobots against Megatron and the Decepticons in a fate to save both Earth and Cybertron.

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

Megatron captures Bulkhead in order to take over Cybertron.

One Autobot has suffered severe damage.

Blackarachnia is desperate to find Wasp before the Autobots.

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

Unaware of the Decepticon activity, the Elite Guard take Optimus Prime and the Autobots back to Cybertron.

Prowl and a mysterious Decepticon bounty hunter go after Starscream.

While chasing an Autobot traitor, Bumblebee thinks back on the time he spent with Bulkhead in the Autobot Boot Camp.

Sentinel has success in capturing fugitive Decepticons.

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

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

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

Megatron and the Decepticons focus on conquering Cybertron.

The Elite Guard heads back to Cybertron with prisoners.

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

Unlikely matchups! It's Optimus Prime and Dinobot Grimlock vs. Blackarachnia and Meltdown.

Ratchet and Captain Fanzone are catapulted to Cybertron.

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.

Wasp travels to Earth to exact his revenge on Bumblebee.

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

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

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