The largest predator on the planet, the sperm whale, is your host for an amazing exploration of the final frontier – the world at the bottom of the ocean. From the makers of the Walking With series comes this incredible marine tour, in which you'll witness a rarely seen world of hidden mountain ranges, majestic canyons, volcanoes and the beautiful and often deadly creatures that inhabit the deep sea.

Cast:Bernard Hill, Scott MacCallum,

Genre:Documentary, TV Movie, Drama,

country:United Kingdom,

Production:Impossible Pictures,