Episode Title:Mutagen Man Unleashed.Episode Description:Donnie becomes very jealous of a student April (who is still holding a grudge against him and his brothers for her father's mutation) is tutoring in math named Casey Jones and vents his sorrows to Timothy. The mutated Pulverizer, affected by this, then begins feeding on the experimental mutagen, enabling him to form sludgy arms and legs, transforming him into the Mutagen blob mutant "Mutagen Man" before escaping to find and persuade April.