The alliance between the Transformers leaders ends. Hotshot and the other Transformers attack Unicron once more. Optimus Prime and Galvatron fight to the death
Scorponok plants a personality-modifying virus on Optimus Primal which will render him a cowardly, submissive weakling. But the virus malfunctions, and Primal gets very, very angry.
S1E11 21 min