Eric Grove (Himself - Naval Historian), James Delgado (Himself - Maritime Archaeologist, SEARCH Inc.), Alfredo Etchegaray (Himself - Admiral Graf Spee Researcher), Fredrik Soreide (Himself - Norwegian University of Science and Technology), Tony Pollard (Himself - University of Glasgow), David Mearns (Himself - Shipwreck Hunter. Blue Water Recoveries), Claudia Hartl (Herself - Dendrochronologist, Johannes Gutenberg University Mainz), Craig Sechler (Narrator), Russell Boulter (Narrator: National Geographic Channel)