The Spaceship Computer, also known as Z, is a character first appearing in the episode "Bye, Bye, Fly" in 1987. He is a spaceship computer found on an abandoned spaceship who helps Baxter Stockman fight the Turtles and Shredder. Both are defeated and left stranded in the Dimensional limbo. The Spaceship Computer was still with Baxter Stockman in "Son of Return of the Fly II." He helped Baxter Stockman escape the Dimensional limbo and return to Earth where he helped Baxter capture the Turtles so that Baxter can fight Shredder. The Spaceship Computer was destroyed in the resulting battle.