Sure enough, Bishop has Stockman's remains recovered from the river, and the scientist is brought back to life. Stockman is enraged, however, deeply bemoaning the chance to finally rest in peace being taken away from him. Stockman resumes work on finding a cure for the mutant outbreak, but it is only during an alliance with the Turtles that a cure is developed - specifically, it is Leatherhead who develops the cure, much to Stockman's ire. Stockman later watches a relic Bishop had the Turtles retrieve from Karai be destroyed, though neither of the two are able to comprehend what they have done: destroying the relic freed the Foot Mystics, who set out to resurrect the Tengu Shredder. In the fifth season, Stockman revives the nano-bot the Turtles had previously encountered, and after its escape, Bishop admits he understands why Stockman was subjected to numerous punishments by the Shredder. When the Tengu Shredder conquers New York, the EPF's base is attacked by his Tengu legions. The EPF are contacted by the Turtles, who convince them to ally with the Justice Force, the Purple Dragons, and the Foot against the demon threat. Stockman takes part in the massive battle, and later when charged with defending Karai alongside Chaplin (much to his displeasure), he is damaged by the Tengu Shredder's dragon form, but ultimately survives the battle and is retrieved by Bishop.