i admit to be in awe of the sea and have spend a number of year in the navy and so i be somewhat bias on this one . i miss this documentary when it first come out but nagged various people to buy me it on dvd this christmas ( 2002 ) and i get it . some of the film be amazing and i have a lot of respect for those who make these kind of documentary and to see 200 ton blue whale cruise through the sea be an incredible sight and they look like submarine . i like the level of information and fact convey through the narration and it be just right and i do not want to know a load of science just some of the basic and to see these thing be enough for most people . the bbc have a knack of put thing at the right level for the intended audience . a really great documentary and up there with the world at war for me and the dvd be of excellent quality . if i have a minor criticism it would be some of the obviously added sound effect here and there and i think they detract from some of the scene . but well do to the bbc and discovery .