The Blue Planet, an epic 8-part nature documentary series hosted by British naturalist David Attenborough exploring the world's oceans.
There are many documentaries about oceans but this is probably the ultimate series ever made. It is 17-year-old now, but the quality of the cinematography and filming equipment makes it look like it could have been made yesterday. As well as offering beautiful imagery, "The Blue Planet" features an in-depth insight into how the oceans operate and the kinds of animals to be found there.
The series begins with an introduction explaining how some of the shots were created and the main goal of the documentary: To highlight the beauty of the world's oceans and how we should all do our part to help preserve them. Episode 1 dives in at the deep-end and reveals an alien world miles below the surface.