Take a surprising look at the world the lurks beneath the surface of the ocean in this video, which collects two episodes of the acclaimed nature series Blue Planet. In "Open Ocean," we're offered a glimpse of the vast stretches of water far away from shore where current and chance dictate which small species will happen by -- and larger species prey upon them for survival. And "The Deep" takes cameras to the bottom of the ocean, where darkness provides a home for some of the sea's strangest creatures, and obscures some of the most fantastic terrain on Earth.