The team investigates the cause of one of the world's greatest maritime mysteries.

A former U.S. Navy diver gives clues to the locations of missing subs from WWII.

The team tries to unlock the story of the Ghost Ship, despite wild seas and challenging dives.

The Laotian Royal Treasures sit on the bottom of the powerful and mysterious Mekong River.

The top-secret launching point for the atomic bombs, the remote volcanic island of Tinian.

The Fletchers dive to bone-chilling depths; they investigate a myth about towering waves.