The Great Barrier Reef Drain the Oceans : Season 4 Episode 7
TV-PG (self-applied) National Geographic 47m
Aired: August 16th, 2021 @ 9:00 PM EST on National Geographic
The mysterious sinking of Australia’s “Titanicâ€, a warship on a dangerous mission, and a ROV expedition searching for clues at the bottom of the reef.
