Saturday morning preview specials were aired on television annually to present previews of each network's fall lineup of Saturday-morning cartoon children's programming. Similar to the model for their new prime time counterpart shows, television networks in the United States and Canada would film a preview special for the fall season. These would often air as part of the regular network schedule, or be made available to their affiliates for airing at any time, especially to fill timeslots which contained programming canceled months before.