National Geogra

From the earliest days of Amazonian exploration, stories filtered back about the terrifying ritual practiced by the region's headshrinkers who would shrink an enemy's head to render the vengeful soul powerless. Including rare footage of a reputed real-life ceremony from the 1960s, this documentary probes whether the film is genuine, if this shocking practice still takes place today, and how such a horrific custom evolved among these remote jungle inhabitants. British writer and adventurer Piers Gibbon is determined to find out, as he heads deep into the rainforest to meet the tribes whose superstitions and desire for revenge led to the legend of the headshrinkers. And in the heart of the jungle Piers discovers why it is still so dangerous to seek out the Headshrinkers of the Amazon.

The grandest ocean liner ever built, its final resting place remained a mystery. Just how was the wreck's discovery linked to the Cold War's darkest days?

Incredible Insects A captivating world of creepy crawlies exists all around us. And they are the biggest group of animals in the world, outnumbering humans 200 million to one. Thanks to millions of years of evolution, these invertebrates not only survive in almost every landscape known to man, but also thrive by means of fascinating, and sometimes bizarre adaptations. There's the Bombardier beetle that squirts a boiling hot liquid from its anus, the Assassin bug that turns its victims into soup, and the Parasitic wasp that lays her eggs inside her victims, until her young are ready to eat their way out. We end off with the biggest bugs on the planet: the Atlas moth with a wingspan of over 20 centimetres, the Hercules beetle that can carry 850 times its own weight, and the Giant centipede - big enough to catch flying bats from midair!