Containership SS El Faro is halfway into its run from Jacksonville, Florida to San Juan, Puerto Rico, carrying 12,000 tons of cargo. The massive 790-foot vessel is built for rough weather, but it's about to meet its match in the form of Category 3 hurricane Joaquin. After the 33-person crew loses a battle against 115-MPH winds and 26-foot swells, the U.S. Coast Guard and NTSB join forces to find out why the ship sailed straight towards the eye of the storm.

The Queen of the North is British Columbia Ferry Services' crown jewel, a luxurious, 410-foot ship that cruises the west coast of Canada. But on March 21, 2006, disaster strikes when the passenger ferry strays off course, hits an island, and fills with icy water. Two passengers are never found, and Canada's Transportation Safety Board immediately launches an investigation. Facts are hard to come by, but rumors of an extramarital affair between two of the bridge crew spark a surprising theory about the ship's final moments.