Donatello Brain Thief

"(W/A) Jim Lawson After defeating the Baxter Stockman Robot, and unknown to his brothers, Donatello takes the robot's remains and sequesters them in a secret room hidden in the sewers. Why would he choose to reactivate their old enemy and more importantly, what is this new robot prowling the sewers? This story takes place immediately after Teenage Mutant Ninja Turtles Series 2 #9."