In July 2015, the New Horizons spacecraft gave us our first close look at Pluto, the most famous dwarf planet in the outskirts of our Solar System. The New Horizons flyby was big news, and the pictures it sent back to Earth reveal a world far more complex than anyone realized. Follow Mike Brown and his team at CalTech as they uncover dwarf worlds whose orbits take them deep into the far reaches of the Solar System. Is there a new planet beyond these distant objects? Join us on the hunt!