In Donatello Hamato's secret cloning lab, Donnie has just attacked and blinded the human intruder Tony Howard. Donnie has also beaten and stabbed his clone "Leo," who is now lying barely alive in a pool of his own blood. A series of flashbacks shows the history of Donnie's depraved cloning experiments—in an attempt to perfect the technology to clone and resurrect Master Splinter, Donnie had repeatedly made defective clones of "Leo," beat each clone to death, and fed new clones the body parts of dead clones. Donnie taunts the current "Leo" to say something philophical, only to hear him repeat back some of Donnie's own most treasured personal memories—proving that "Leo" is not a clone of Leonardo, but actually a clone of Donatello himself, the insane turtle having deluded himself into believ