This is the story of Nim, the chimpanzee who in the 1970s became the focus of a landmark experiment which aimed to show that an ape could learn to communicate with language if raised and nurtured like a human child. Following Nim's extraordinary journey through human society, this documentary feature examines the enduring impact he makes on the people he meets along the way; the film is an unflinching and unsentimental biography of an animal we tried to make human.

Marine wildlife programme. As part of Big Blue Week, Hugh Fearnley-Whittingstall and a team of marine enthusiasts follow the animals arriving and thriving in UK waters.

In 1900, a storm blew a boatload of sponge divers off course and forced them to take shelter by the tiny Mediterranean island of Antikythera. Diving the next day, they discovered a 2,000 year-old Greek shipwreck. Among the ship's cargo they hauled up was an unimpressive green lump of corroded bronze. Rusted remnants of gear wheels could be seen on its surface, suggesting some kind of intricate mechanism. The first X-ray studies confirmed that idea, but how it worked and what it was for puzzled scientists for decades.

From the Chhatrapati Shivaji Terminus in Mumbai, Dan Snow, Anita Rani, Robert Llewellyn explore the science and systems behind the world’s busiest railway. With John Sergeant reporting from across India.

Rome was the world's first ancient megacity. At a time when few towns could number more than 10,000 inhabitants, more than a million lived in Rome. But in a world without modern technology, how on earth did the Romans do it? How did they feed their burgeoning population, how did they house them, and how did they get them into town without buses or trains? How on earth did the Romans make their great city work?

Stephen Smith meets Andy Warhol's friends and confidantes to get closer to the man behind the enigmatic public image, experiencing a day in the life of the pop art superstar. Andy Warhol created some of the most instantly recognisable art of the 20th century. But perhaps his greatest work of art was himself - the cool, enigmatic pop art superstar. In this film, Stephen Smith sets out to discover the real Andy Warhol - in the hour-by-hour detail of his daily life.

David Attenborough returns to the island of Madagascar on a very personal quest. In 1960 he visited the island to film one of his first ever wildlife series, Zoo Quest. Whilst he was there, he acquired a giant egg. It was the egg of an extinct bird known as the 'elephant bird' - the largest bird that ever lived. It has been one of his most treasured possessions ever since.

Dr Richard Clay goes in search of what it is that has made us scribble and scratch mementoes of our lives for more than 30,000 years. From the prehistoric cave paintings of Burgundy in France, through gladiatorial fan worship in Roman Lyons to the messages left on the walls of Germany's Reichstag in 1945 by triumphant Soviet troops, time and again we have wanted to leave a permanent record of our existence for our descendants. And it may be that this is where what today we call art comes from - the humble scratch, graffiti.

TV presenter and journalist Anne Robinson sets off on a road trip to get up close and personal with people from across the wealth spectrum and puts their spending habits under the microscope.

The heroic tales of World War II are legendary, but Operation Crossbow is a little known story that deserves to join the hall of fame: how the Allies used 3D photos to thwart the Nazis' weapons of mass destruction before they could obliterate Britain.

Kate Humble and Simon King report from Zambia, following the lives of the animals living along the Luangwa River at a critical time in the seasons.

Billie JD Porter reveals what it's really like to grow up in China, where respect for state and elders is being drilled into the next generation.

Art historian Dr Nina Ramirez reveals the codes and messages hidden in Anglo-Saxon art. From the beautiful jewellery that adorned the first violent pagan invaders through to the stunning Christian manuscripts they would become famous for, she explores the beliefs and ideas that shaped Anglo-Saxon art.

The dark heart of the Nazi holocaust, Treblinka was an extermination camp where over 800,000 Polish Jews perished from 1942. Only two men can bear final witness to its terrible crimes. Samuel Willenberg and Kalman Taigman were slave labourers who escaped in a dramatic revolt in August 1943. One would seek vengeance in the 1944 Warsaw Uprising, while the other would appear in the sensational trial of Adolf Eichmann in 1961. This film documents their amazing survivor stories and the tragic fate of their families, and offers new insights into a forgotten death camp.

The British fought the Second World War to defeat Hitler. This film asks why, then, did they spend so much of the conflict battling through North Africa and Italy?