The initial storylines were close adaptations of the 1987 Teenage Mutant Ninja Turtles television series, but by the fifth issue the creators handed the series over to Ryan Brown and Stephen Murphy. In their hands the comic immediately diverged from the cartoon series into unique new story arcs, often incorporating social, environmentalist, and animal-rights themes. It also introduced several new characters of various races and backgrounds, including humans, mutants, aliens, and other anthropomorphic creatures. Additionally, the series added new layers to established players such as April O’Neil, who began training with a katana, and the Shredder, who gradually revealed a sense of honor. The stories were often seen as ‘deeper’ and more ‘serious’ than the cartoon. As the new tales and characters were explored, original antagonists Krang, Bebop and Rocksteady were eventually phased out early, making later appearances during stories involving alien worlds. Shredder would remain a recurring adversary.
EHT Comics 