The final leg of the team's historic mission takes them into the world's coldest ocean: the Arctic. There they explore a giant underwater mountain.

The team face the ultimate challenge with the deepest dive on earth: the Mariana trench in the Pacific Ocean. They make remarkable discoveries in its depths.

Victor and the team explore the Indian Ocean's deepest point. They seek evidence on the volatile sea floor of what produced five of history's deadliest tsunamis.

Explorer Victor Vescovo and his crew brave the freezing waters of the most challenging ocean on earth, the Southern Ocean, in search of its deepest point.

Explorer Victor Vescovo and his team hunt for the Atlantic Ocean's deepest point off the island of Puerto Rico, where they discover fascinating new species.