Leatherhead (Image)

After two children are found slain and half-eaten in the sewers, Leonardo comes to believe that Leatherhead may have been responsible. Tracking down Leatherhead, Leonardo was surprised to find the mutant alligator unconscious and bound. Before he could free Leatherhead, Leonardo was attacked by King Komodo and his Monitor lizard minions, the actual killers of the children.

Engaging King Komodo in battle, Leonardo successfully managed to kill King Komodo's minions, only to end-up being knocked unconscious with his hand bitten off. Waking up hours later, Leonardo managed to free Leatherhead and the two, with help from Michaelangelo and Casey Jones managed to defeat King Komodo.

Afterwards Leatherhead, his feud with the Turtles forgotten, introduced them to Dr. X, an Utrom left behind from when the TCRI building collapsed. Together with Dr. X and the Turtles, Leatherhead managed to assemble a new Transmat Device, unfortunately, energy projected from the device ended-up luring a group of Triceratons to Leatherhead's lair.

Engaging the Triceratons in battle with the Turtles, Leatherhead managed to viciously maul several of them. Unfortunately, while battling the last remaining Triceraton, Dr. X and Leatherhead's Transmat Device malfunctioned and transported Leatherhead and the unnamed Triceraton to parts unknown.