Join Hayden Planetarium's director Neil deGrasse Tyson as he follows the story of Pluto's discovery and the science that surrounds this former planet, including the possibility of finding more Pluto-like planets in the mysterious Kuiper belt. From the scientists trying to classify Pluto to die-hard "Pluto-philes," Tyson meets a fascinating cast of characters with just one thing in common: Strong opinions about Pluto.