Serot is an asteroid located in Dimension X in the 1987-1996 series, home to some slave pits that were run by Vorx. It was also the location of the pit of the Great Chaarg, which in practice served as a death penalty for rebelling slaves attemping to escape. The Turtles were taken there after being sent by Shredder to Dimension X in the Shredder Triumphant episode.[1]