Counting from the first meeting with the Turtles, Shredder spent eight seasons plotting ways to defeat them. In the season 8 episode "Turtle Trek", the Turtles destroy the engines of the Technodrome, trapping it and its inhabitants in Dimension X for good and putting an end to Shredder's plans. He spent the next two seasons in Dimension X, until he was contacted by Dregg ("The Power of Three"). Dregg arranged for him and Krang to come back to Earth, to help him fight the Turtles. Together, they capture the Turtles, but Dregg then betrays them and tries to drain the life energy of the Turtles, Krang, and Shredder all at once, making them weaker while Dregg becomes stronger. Shredder alone escapes the trap and restores Krang ("A Turtle in Time"), but Dregg captures them again. Finally, the Turtles spoil Dregg's plan and transport Shredder and Krang back to Dimension X ("Turtles to the Second Power"). In the series finale "Divide and Conquer", the Turtles return to the Technodrome in Dimension X to take Krang's android body, which they need to fight Dregg. Shredder is nowhere to be seen, but it is assumed that he is still somewhere in Dimension X.