Frog was an orphan who was taken in by the sadistic Sewer King who lived in Gotham's sewers. Frog and the other children were forced to steal for the Sewer King and were abused by him  as well. One night while out in the Gotham streets he was cought by Batman who brought him back to Wayne Manor. Frog showed Batman where to find Sewer King and the Dark Knight brought him to justice. Frog and the other children are then put in foster care. Frog speaks only one time in the episode and his actor is uncredited.