Toonami to Air Parasyte Marathon Thanksgiving Weekend First seven episodes will be shown By Norbert Daniels Jr. Posted 11/22/2015 Toonami ran a promo Sunday morning informing us that it will be running a marathon of Parasyte: The Maxim during its block on Thanksgiving weekend. Parasyte: The Maxim, based on Hitoshi Iwaaki’s Parasyte manga, is about a high school student who battles an alien invasion of Earth using a shapeshifting parasite that has taken over his hand. The English dub premiered on Toonami on October 4 of this year. The marathon will be showing the first seven episodes of the show. You can watch the promo below.