12/24 Tessa Dunlop reveals the untold story of the Royal Navy's sea power.
1/3 Chris Packham examines some of the world's weirdest natural events.
13/13 David Attenborough looks at how and why humans have come to dominate life on earth.
4/4 Griff Rhys Jones visits Tredegar House, one of the grandest Restoration houses in Britain.
3/3 Follows the animals' fortunes through the wet and dry seasons in this island of extremes.
3/4 The team tour the RHS Hampton Court Palace Garden Festival.
4/4 Gordon Buchanan flies over south east Asia, as booming economies take a toll on wildlife.
4/14 Dr Bryan Fry uses hi-tech tools to uncover the true nature of the world's largest lizard.
1/2 Liz Bonnin, Freida Pinto and Jon Gupta reveal the hidden wonders of India's natural world.
2/5 Gordon and Ed are in Essex, where they head out in search of urban foxes and badgers.