Tonight’s episode of this don’t-miss nature series is called “The Big Blue,” and ventures deep into the vast expanses of open ocean – deep in both the depth and expanse of water – to capture some truly astounding creatures and footage. Tonight, there are whale sharks, and also sharks forcefully ripping apart a whale carcass, and spinner dolphins churning up the ocean until it seems to boil, and… just watch, okay? You’ll be glad you did.