Teen Titans - Season 3 Episode 9

During a fight with Adonis, Beast Boy gets covered in toxic waste. The day after the fight, he shows different changes, such as eating meat, pumping iron and acting nasty. He has a fight with Raven and turns into a Man-Beast and runs amock in the sewers. The Titans discover Raven in his mouth and go to the conclusion that he attacked her and threatened to put him in prison, which makes him angry and form into the Man-Beast once more. But When Cyborg and Robin leave to fight him, leaving Starfire to watch over her, Raven wakes up and says that he saved her. When the guys get to Beast Boy, he gets attacked by another Beast. Beast Boy wins and the other Beast turns out to be Adonis.