Guest Stars Eric Grove as Himself (Naval Historian) Jann Witt as Himself (Historian) Runar Lia as Himself Fredrik Soreide as Himself David Mearns as Himself (Shipwreck Hunter) Andrzej Słaby as Himself (Hydrographer) Stephen Burke as Himself (Author) Adam Olejnik as Himself (Author) Innes McCartney as Himself (Marine Archaeologist)