Shredder lures Splinter into The Technodrome, this time with the promise that a weapon in his possession can restore the sensei to human form.
The Turtles confront a giant-sized Krang, now in a new body, in the heart of New York City. The five then battle the invading Dimension X troops inside The Technodrome, resulting in the banishment of the fortress, and it's insidious occupants, into Dimension X itself.