After the explosion of Speed Demon, some mutagen were spilled over a eagle carrying a salmon eating a worm. Thus, the three animals merged together and became the Chimera. The giant creature devoured several local people and finally attacked the Turtles, capturing Donatello, Michelangelo, Raphael and Casey Jones. However, Leonardo and April, who got a psychic connection to the Chimera since an accident with one of Donatello's inventions, came to rescue them. They apparently managed to kill the creature, but at the end of the episode the Chimera is revealed to be alive.
- Chimera seems to be inspired by The Giant Claw.