Porco has been a regular CNN guest analyst and consultant on astronomy, has made many radio and television appearances explaining science to the lay audience, including appearances on the MacNeil/Lehrer "Newshour", CBS's "60 Minutes", Peter Jennings's "The Century", and TV documentaries on planetary exploration such as "The Planets" on the Discovery Channel and the BBC, "A Traveler's Guide to the Planets" on the National Geographic Channel, "Horizon" on the BBC, and a Nova Cassini special on PBS. For the 2003 A&E special on the Voyager mission entitled "Cosmic Journey: The Voyager Interstellar Mission and Message", Porco appeared onscreen and also served as the show's science advisor and animation director.