Recurring Guest Characters Great Lakes Shipwreck Historical Society 4 guest appearances Underwater Explorer 1 guest appearances Host 1 guest appearances Son of John McCarthy, Crewman 1 guest appearances Great Lakes Historian 1 guest appearances Mother of Bruce Hudson, Crewman 1 guest appearances Wife of Michael Armagost, Crewman 1 guest appearances Daughter of Oliver Champeau, Crewman 1 guest appearances Executive Director, Great Lakes Shipwreck Historical Society 1 guest appearances Sonar Technology Expert 1 guest appearances Son of Michael Armagost, Crewman 1 guest appearances Inventor of the "Newt Suit" 1 guest appearances Host & Narrator 1 guest appearances