It was first shown on WNET as a "sneak peek" on March 24, 2000, before making its official debut on January 21, 2002. In 2010, after the season eight finale, PBS put the series on hiatus, but it returned in 2013 for a ninth season, followed by a tenth season in 2015. The eleventh season premiered on October 23, 2017. There was a twelfth season that premiered on April 19, 2019.