Believe it or not, recreational shark encounters are now one of the most popular attractions in scuba diving. High adrenaline shark feedings attract not only hungry sharks, but also fascinated divers. This episode will feature several shark species and shark encounters from around the world. Expedition divers will test new technology to closely study and photograph the animals.

In the 1990's, three large naval vessels were intentionally sunk as part of the world's most ambitious artificial reef project. Instead of being sold as scrap metal, the ships were purchased by the Artificial Reef Society of British Columbia. This program will follow the preparation and sinking of these ships and document their progress underwater as man made reefs.

This program will feature several colourful treasure hunters including Mel Fisher, Teddy Tucker, and Henry Cox. The program will follow the men as they search for lost ships and artefacts. Expedition divers will travel to Bermuda, an island early Spanish sailors deemed, "Isle of Devils" because of its treacherous reefs and work with Tucker and Cox on their latest finds. Preservation techniques for artefacts and different types of treasure coins will also be examined.

One of the world's richest and most diverse ecosystems is under attack from human settlement and over fishing. This program will explore the magnificent underwater world of the Galapagos Islands including remarkable encounters with hammerhead and whale sharks. The program will also examine the threats to the islands from foreign fishing interests.

250 miles south of the Baja Peninsula of Mexico lie the remote Socorro Islands. These islands are home to an astonishing array of marine life including humpback whales, dolphins and giant manta rays. Expedition divers will study & interact with mantas and will also examine the intelligence of fish and how they "think".

Expedition divers will travel to the Cayman Islands to explore the Cayman Trench aboard a deep sea submersible. Divers will also examine the shallow coral reef and its nocturnal residents. In addition, this program will document the progress of a former Soviet warship sunk as an artificial reef off the coast of Cayman Brac. The rays of "Stingray City" will also be featured.