Did a Bermuda Triangle tsunami claim two behemoth ships, or did they fall prey to Nazi U-Boats? The team sets its sights on a famous Bermuda Triangle case: the twin vanishings of two massive cargo ships. In November-December 1941, the massive USS Proteus disappears after crossing the Bermuda Triangle. Then two weeks later, without warning, a second nearly-identical giant ship, the USS Nereus, also drops off the earth. Divers Mike Barnette and Jimmy Gadomski dive into the abyss searching for these missing ships, while the land team follows clues that lead them from tidal waves, to Nazi U-Boats, and ultimately to one of their biggest finds.

The team thinks a 300-foot wreck off the tip of Florida just might be the Sudoffco - a steel freighter lost in 1926 with 29 men while traveling through the Triangle from New Jersey to the Panama Canal. A land station reported hearing a faint, desperate SOS around the time she went missing. Was she taken out by severe coastal storms? Or did her crew succumb to a bizarre condition that might drive sailors mad and cause them to jump overboard in the Bermuda Triangle?