 A co-production of Marvel Productions and TSR.The show's story editors were Hank Saroyan (who voice directed the series) and Steve Gerber, both of whom contributed episodes and had a firm hand in the writing of the series.The level of violence was controversial for American children's television at the time, and the script of one episode, "The Dragon's Graveyard", was almost shelved because the characters contemplated killing their nemesis, Venger.