As a professional archeologist, Garth finds the clues to larger historical stories in everything left behind on the planet. Calling on his inquisitive mind, historical knowledge and previous military experience, Garth is the team member who analyzes and interprets all of the items found by the divers at the bottom of the Caribbean Sea. His insight is invaluable for piecing together the historical mystery at the center of this adventure: if these are, in fact, treasure-filled sunken U-Boats, where were they going and why?