While searching for the missing mutagen, the Turtles encounter a squirrel forcing its way down the throat of a Homeless Guy. After taking him back to their lair for study, the Turtles are shocked when the creature multiplies within the man's stomach and escapes. They try to track down the mammals, unaware that they have undergone a metamorphosis into hideous mutagen creatures.
Home video releases
- Teenage Mutant Ninja Turtles: Mutagen Mayhem
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