Titanica

Sir David Attenborough unveils the two stunning underwater realms of Saudi Arabia - the flamboyant Red Sea and the contrasting hot muddy Gulf, capturing for the first time the rare event of Palolo worms spawning at night.

For thousands of years, gold has been the most treasured and coveted of all metals. But extraction sites are dwindling and what little gold that remains is harder and harder to mine. However, there is a place where you can still find vast quantities of gold. Underwater archaeology has revealed that 3 million shipwrecks litter the ocean floor, 3,500 of which sunk with cargoes of ’precious metals’ onboard. Billions of dollars worth of gold, just sitting there, at the bottom of the sea. With today’s technology, this gold is in reach.

The sinking of the RMS Titanic remains one of the most enduring and mysterious tragedies of the 20th century. For decades, investigators and amateurs alike have floated theories for why it occurred and who was to blame for the extraordinary loss of life, but no one answer could fully explain what happened. Until now. To mark the 100th anniversary of the infamous disaster, Smithsonian Channel will premiere Titanic's Final Mystery. The two-hour special investigates a century of theories and uncovers astonishing new forensic evidence that proves the most likely theory for the case.

Narratives of ecologists and conservationists are pitted against the human tendency to engineer and control in this probing documentary on the lucrative salmon-hatchery industry.

A moving record of a natural disaster, Volcano documents the effect of a sudden volcanic eruption on the tiny island of Haimaey, off the coast of Iceland. Blasts of flame, clouds of black smoke and showers of rock erupt from the screen in a poignant portrait of a stricken town.

The Titanic is under a new threat. Resting at over 12,500 feet below sea level and 380 nautical miles off the coast of Newfoundland, the most famous shipwreck in the world is being consumed by a colony of iron-eating bacteria. This slow and irreversible decay, according to the most concerned experts, will sweep away all the secrets of the mythic liner within a few decades. This documentary details the underwater odyssey of the greatest Titanic expeditions and the evolution of the most scrutinized shipwreck in the world. From the epic discovery of the wreck by a French-American team in 1985 to the exploratory missions led by James Cameron, and to the treasure hunts that brought back over 5,000 vestiges–experience the unequaled thrill of these extreme dives through the eyes of the explorers who have attempted to unlock Titanic’s secrets.

Computer-generated imagery and other visualization techniques reveal how it would look if all the water was removed from RMS Titanic's final resting place.

Valerie Taylor is a shark fanatic and an Australian icon – a marine maverick who forged her way as a fearless diver, cinematographer and conservationist. She filmed the real sharks for Jaws and famously wore a chainmail suit, using herself as shark bait, changing our scientific understanding of sharks forever.

Titans of the Ice Age transports viewers to the beautiful and otherworldly frozen landscapes of North America, Europe and Asia ten thousand years before modern civilization. Dazzling computer-generated imagery brings this mysterious era to life - from saber-toothed cats and giant sloths to the iconic mammoths, giants both feared and hunted by prehistoric humans.

Readings from the diaries, accounts and letters of its passengers and crew tell the story of the Titanic, which sank 100 years ago today on its maiden voyage. The cast includes Richard E Grant, Roger Allam, Anna Madeley, James Wilby and Claudie Blakley, alongside relatives of those who were on board. Charles Dance narrates.