The setting of the series was two years after the last episode of Batman, and to give it the whole time-jump feeling, many things in Gotham had changed. In the two years, Dick Grayson had retired from being Robin, and he traveled the world (like Batman) and returned to Gotham as Nightwing. Barbara Gordon became a full member of Batman's team as she became his main partner. Then, a new Robin, Tim Drake came into the gang and they became the knights of Gotham.