The appearance of an outsider puts Rick and Shane at odds; Hershel’s youngest daughter faces a momentous decision and Andrea steps in to help.

The lost tomb of Genghis Khan, Mongolia's best-kept secret and only remaining tie to its spiritual and political forefather, could be unearthed and destroyed by looters at any time. Can engineer and explorer Albert Lin, equipped with cutting-edge technology and just a handful of obscure clues from ancient texts, find and protect the tomb of the Great Khan before it is possibly destroyed? National Geographic joins Lin on a seemingly impossible quest: to locate the tomb of Genghis Khan without being allowed to dig, somewhere in a territory that measures thousands of square miles in area. Lin's research leads him to search for a lost mountain-the Burkhan Khaldun-in the heart of the "forbidden zone." But to get there he must first conquer a series of natural obstacles, including an inhospitable landscape, swollen rivers, and violent storms. It is on the Burkhan Khaldun that Lin makes his most remarkable discovery, one that may solve an 800-year old mystery and cause waves in the archaeological community for decades to come.

Ground-breaking documentary granting a unique and privileged access into the magical world of whales and dolphins, uncovering the secrets of their intimate lives as never before. This episode explores the intimate details of the largest animals that have ever lived on our planet- the great whales. From the balmy waters of the Indian Ocean to the freezing seas of the Arctic, two daring underwater cameramen - Doug Allan, Planet Earth's polar specialist, and Didier Noirot, Cousteau's front-line cameraman - come face-to-face with fighting humpback whales and two-hundred-ton feeding blue whales.

Deep Thinkers Like us whales and dolphins have large brains, live in complex societies and appear capable of highly intelligent behaviour. But are these marine mammals really as smart as we would like to think? From the balmy waters of the Caribbean to the rich seas of Alaska, our underwater cameramen - Doug Allan and Didier Noirot - come face to face with ingenious bubble-netting humpback whales and cunning dolphins that take advantage of hunting stingrays. In this episode we discover just how smart whales and dolphins really are. We meet the scientist who is close to talking with dolphins, discover why bottlenose dolphins have fallen in love with their own reflection and meet the whales that have the ability to empathise with us.

The actress travels through Karnataka, Kerala and Tamil Nadu to the sub-continent's southern tip, visiting the 'City of Palaces' Mysore, where she receives a guided tour by a snake guru. Caroline ventures into the Malnad region to track down a healer who claims he can cure cancers, before helping to bathe elephants in the Keralan backwaters. Her journey ends with a dip in the holy waters of Kanyakumari, where the Bay of Bengal, the Indian Ocean and the Arabian Sea meet