Sir David Attenborough narrates this critically acclaimed series that dives deep into the marine environment of Planet Earth. Although two-thirds of the world's surface is covered with water, scientists know less about the oceans than they do about the surface of the moon. This limited series travels from various coasts to the poles to examine watery denizens ranging from the gigantic blue whale to microscopic coral polyps.

Follow new surgical registrar Dr Caroline Todd through her first day at work and beyond, starting out as she means to go on - dishevelled and under-deodorised! Along the way she meets an assortment of bizarre and demented characters. Be prepared for one of the most surreal journeys you're ever likely to take as you dive into the anarchic world of Green Wing Hospital!