Sky Nature HD Wednesday

After Beni's date with the dentist, it's back to class as usual, but life is about to turn from bad to worse for the gentle giant

The two wild fortresses that protect the vulnerable animals - a remote island shielded by saltwater and a hilltop citadel surrounded by a predator-proof barrier

Tanzania's Lake Manyara National Park, an area enriched by ancient volcanos which provides a variety of habitats for life to thrive

The wildlife presenter explores the magic of Ireland's western islands, beginning with Rathlin, Malin Head and Inishtrahull, where he sees basking sharks and dolphins

The story of Palau, an island nation in the Pacific which in 2009 created the world's first shark sanctuary for more than 100 species

Summer brings challenges and opportunities on the African plains, as many animals are able to feast, while others battle it out in search for food and water in the merciless heat