We've watched them streak across the sky for centuries, but what - beyond their sometimes extraordinary and fleeting beauty - do we really know about comets? Follow a breakthrough mission to demystify and - for the very first time - capture the contents of a comet. Premiering Sunday, January 22 2005 at 7 p.m. ET/8 p.m. PT on Discovery Channel, Catching the Comet follows the exploration of a comet by devising an innovative way to bring one home.