A dysfunctional couple head to a remote lakeside cabin under the guise of reconnecting, but each has secret designs to kill the other. Before they can carry out their respective plans, unexpected visitors arrive and the couple is faced with a greater danger than anything they could have plotted.

Ancient rivalry, conflict between brothers and a tale of murder and punishment, but how does the Koran's version of Cain and Abel differ from that of the Old Testament?

A visually stunning portrait of one of nature's most agile and fearsome predators, the Goshawk. This secretive bird of prey can be hard to see in the UK, but reigns supreme in Korea's mountains.

Was Adolf Hitler influenced and motivated by the occult? Through the years, historians have debated the mysterious connection between the occult, Hitler and the Nazi party, including some who maintain that Hitler killed others to keep his occult beliefs a secret. NGC examines how Hitler's involvement with the German Worker's Party brought him face-to-face with occultists who may have influenced his beliefs.

Nearly 40 shark species live in the warm waters of Hawaii's volcanic islands, including white tip reef sharks, Galapagos sharks and tiger sharks.

A clash of true oceanic titans sees fights in the remote battlefields of Ascension Island. Tuna are often faster, fitter and bigger than the sharks.

Experts weigh in on the mysteries of the Dead Sea Scrolls, which contain books from the Old Testament and other ancient texts.

Even 2,000 years after his death, General Hannibal's battle strategies are still studied today. But of all his military feats, perhaps his greatest was leading his massive Carthaginian army of men and three-dozen elephants across the Alps and into the heartland of Rome in 218 B.C. Until now, the route they took has been a matter of dispute, but thanks to modern-day technology, geomorphologist Bill Mahaney and microbiologist Chris Allen believe they've accurately traced this ancient journey.

There is a mystery there and the answer lies somewhere between Bermuda, Puerto Rico and Miami. Hundreds of boats and planes have disappeared in the ocean with little or no trace at all. Most of these cases can be explained quite easily by human error or bad weather. But there are some that defy all explanation. Theories abound on these causes: Aliens, massive gas eruptions and freak waves. The documentary reveals that the boats and planes face a real danger in a triangle, but the true threat is often as strange as the wildest theory.

In honour of the 15th Anniversary of 9/11, National Geographic Channel is looking back at the very best reporting we have done since this world-changing tragedy first happened using extended excerpts from past specials that relate directly to events leading up to and following the attacks on New York City and Washington DC.