Built like a battleship, sailed under calm seas on a crystal clear night with the best captain of its day and a first class crew. Yet, despite all of this, the world’s most luxurious ocean liner, Titanic, met its tragic end on a frigid night 100 years ago, taking with it the lives of more than 1,500 people. Left in its wake, one of the world’s greatest mysteries: how could this tragedy happen? A looming question that has remained unanswered…until now. New documentaries re-trace the origins and visit the underwater grave of this iconic ship.