The Transformers
S02E45 Cosmic Rust
Megatron unleashes a dangerous plague known as Cosmic Rust upon his Decepticon allies. In a bid to find a remedy, he captures Perceptor, who ultimately discovers that element X can reverse the effects. The Decepticons are healed, but they turn on Perceptor, using him to infect the Autobots with the very same Cosmic Rust. Meanwhile, the supply of element X dwindles, putting everyone at risk.
Season 2 Episodes
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Autobot Spike
The Immobilizer
Dinobot Island (1)
Dinobot Island (2)
Traitor
Enter the Nightbird
Changing Gears
A Prime Problem
Atlantis, Arise!
Attack of the Autobots
Microbots
The Master Builders
The Insecticon Syndrome
Day of the Machines
Megatron's Master Plan (1)
Megatron's Master Plan (2)
Auto Berserk
City of Steel
Desertion of the Dinobots (1)
Desertion of the Dinobots (2)
Blaster Blues
A Decepticon Raider in King Arthur's Court
The God Gambit
The Core
Make Tracks
The Autobot Run
The Golden Lagoon
Quest for Survival
The Secret of Omega Supreme
Child's Play
The Gambler
The Search for Alpha Trion
Auto-Bop
Prime Target
The Girl Who Loved Powerglide
Triple TakeOver
Sea Change
Hoist Goes Hollywood
The Key to Vector Sigma (1)
The Key to Vector Sigma (2)
Aerial Assault
Masquerade
Trans-Europe Express
War Dawn
Cosmic Rust
Kremzeek!
Starscream's Brigade
The Revenge of Bruticus
B.O.T.