hosted and narrated by Chris Morgan ; a Mike Birkhead Associates production in coproduction with Thirteen in association with WNET ; producer, Mike Birkhead, Joe Loncaine
narrated by Jay O. Sanders ; produced by Jim Norton and Rob Whittlesey ; a production of Sea Studios Foundation and Thirteen ; in association with WNET New York Public Media and National Geographic Channel
narrated by Paul Giamatti ; produced by Ann Johnson Prum ; written by Janet Hess ; a production of Coneflower Productions and Thirteen in association with WNET