Transformers: Animated

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

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.