What is it about cold, distant Pluto that captures so many hearts? Join Neil deGrasse Tyson on his quest to find out.

Since its discovery in 1930, Pluto has held a warm place in the public imagination. So when the American Museum of Natural History's Hayden Planetarium stopped calling Pluto a planet, director Neil deGrasse Tyson found himself at the center of a firestorm — a firestorm led by angry Pluto-loving elementary school students. But what is it about this cold, distant rock that captures so many hearts? NOVA joins Tyson on a quest to find out. 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. Based on Tyson's book The Pluto Files, this is a light-hearted look at the solar system's best-loved non-planet.