Four maritime catastrophes anchor this episode of Desperate Hours, each treated as a case study in what happens when human error meets open water. The sinking of the Titanic opens the film, its builders' claims of an unsinkable ship set against the iceberg that proved them wrong. From there the episode moves to South Korea's Sewol ferry disaster, where hundreds of students died after the vessel capsized on a routine crossing, and to the Exxon Valdez, whose ruptured hull sent millions of gallons of crude oil into Prince William Sound and left Alaska's coastline coated in oil for years afterward. A final segment turns to modern piracy, tracking how armed hijackings have returned to shipping lanes once considered safe. Archival footage, news clips, and expert commentary carry the narration through each disaster, tracing the chain of decisions, mechanical failure, and bad luck behind them. The throughline is blunt: the sea does not forgive carelessness, whether it belongs to a shipbuilder, a ferry captain, or an oil company.