Drain Alcatraz uses cutting edge visual effects to 'drain' the waters around the notorious island of Alcatraz. With the waters drained away the secrets of Alcatraz are revealed, including exactly why the island's infamous prison was so inescapable.

Release : December 19, 2017

Website : http://natgeotv.com/int/drain-alcatraz

Duration : 45 minutes

Rating : 6.60