Stockman had managed to escape the spider by the time he appeared the next year, in season four's "Son of Return of the Fly II." Although he still had the ship's computer for company, the exile evidently didn't do Baxter's mind any good, as he steadily began to act more and more like a fly, being fascinated by bright lights, craving sugar, being unable to focus on complicated tasks, and not even being able to remember exactly who it was he wanted revenge on, or why. With the computer's help and guidance, he was able to return to Earth through a small rift in the fabric of space-time, and captured the Turtles in order to lure Shredder into combat. Unable to bear the thought of anyone other than him destroying the Turtles, the Shredder answered Stockman's challenge, but in the battle that ensued, the computer was destroyed, leaving behind only a circuit board that housed its intelligence. Shredder fled back to Dimension X, but when Baxter attempted to pursue him, Krang shut the portal down before Stockman emerged, again stranding the fly in interdimensional space.