On November 10, 1975, the Great Lakes freighter Edmund Fitzgerald sank in a violent Lake Superior storm, taking all 29 crew members down with her and leaving no witnesses and no survivors. This episode of Dive Detectives sends divers and maritime investigators down to the wreck itself, sitting broken in two pieces on the lake floor, to weigh the competing theories that have circulated for decades. Was it a rogue wave, structural failure in the hull, faulty hatch covers letting water flood the cargo holds, or navigational error in the storm that doomed the ship? Interviews with maritime historians and engineers sit alongside underwater footage of the wreck and dramatized reconstructions of the ship's final hours, tracing the storm's path across the lake and the radio contact that went silent. The film builds its case the way a real investigation would, testing each theory against the physical evidence on the wreck rather than settling for the official Coast Guard explanation, and it leaves room for genuine uncertainty about what actually happened that night.