Expedition Unknown

Season 7, Episode 6

Episode Title: Ghost Ship of the Great Lakes

Air Date: 2019-05-08

Overview:

Josh Gates tackles an enduring maritime mystery, the first ship to be lost in the Great Lakes, the Griffon. Using a state of the art two-man submersible, Josh dives in to find a ship so elusive it's known as "The Holy Grail of Shipwrecks."