Writing Gary Parker Directed On the Brink: Doomsday 1997 Other Credits Survivor Writer 2022 Sea of Hope: America's Underwater Treasures Writer 2017 National Geographic: Hitler and the Occult Writer 2007 Lions of Crocodile River Writer 2007 Fight Science Writer 2007 Secret History of Religion: Doomsday - Book of Revelation Writer 2006 Jesse James: Legend, Outlaw, Terrorist Writer 2005 Lizzie Borden Had an Axe Writer 2004 The Curse of Tutankhamun Producer 1999 Agent-readable