These story arcs presented all-new episodes which followed the teenage characters during their summer vacations from high school. In the DVD releases, they are packaged as parts of Seasons 2 and 3 respectively. The concept was highly unique, as television shows typically do not present new episodes during the period between their annual finales and premieres. In more recent times, certain shows have begun offering new interval material in other forms, including shorts on the Internet, and television movies.