Seatek

Follow a freshwater cave diver. A man knows hundreds of lemon sharks by number. Visit one of the most advanced virtual reality training simulators.

This episode explores the art of taking a giant 300-foot ship from shore to sea, where millions of dollars and thousands of man-hours hang in the balance.

Diving in an intricate cave system in Florida, scientists are finding a treasure trove of ancient bones from the Mastodon's era.

Travel with famed underwater cinematographer Al Giddings in a specially equipped photo-sub to shed a rare light on the Titanic!

Travel on a new, powerful class of icebreaker as it attempts a historical run at the North Pole. Visit the world's only full-time underwater colony.

This episode focuses on spear fishermen and the world's first invisible boat.