Jeremy Wade follows investigators as they dive the wreck of the ferry MS Estonia; the case of America's notorious skyjacker DB Cooper takes an intriguing underwater twist.

Jeremy Wade explores the puzzling disappearance of an Indonesian submarine, and the latest research into an underwater phenomenon may help piece together how it vanished. Also, a hoard of riches is found inside the wreck of an 18th-century Dutch vessel.

Jeremy Wade explores an accident involving a Russian nuclear submarine on a top-secret mission, and shocking details emerge surrounding the vessel's design; scientists investigate ancient human remains emerging from a lake in Finland

Jeremy Wade investigates the infamous shipwreck of the Titanic; locals are baffled when a bag containing 54 severed human hands is found on the banks of a Siberian river.

Jeremy Wade explores a fresh scientific discovery that may finally uncover the truth behind the Battle of Actium, one of history's most puzzling military defeats. Also, Jeremy investigates what could be the first recorded case of a whale rescuing a human.

Jeremy Wade explores the hidden and dark secrets behind a 150-year-old shipwreck off the coast of Sisal, Mexico, revealing an unknown and troubling maritime past. Also, a mysterious boiling river hidden deep in the heart of the Amazon is uncovered.

Jeremy Wade explores a shipwreck that may contain stolen Nazi treasure, the priceless lost furnishings of the 18th century Amber Room. Also, astonishing footage captures the exact moment when freight ship MV Arvin split in two and sank in the Black Sea.

Jeremy Wade examines new evidence that could finally reveal what happened to aviator Amelia Earhart; Jeremy investigates a strange anchor found in the Mediterranean Sea.