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11 Episodes 2014 - 2014
Episode 1
Sat, Feb 15, 2014 27 mins
The Season 4 premiere travels to Manuk, a small volcanic island in Indonesia, to learn why its waters are teeming with thousands of venomous sea snakes. Also: a visit to a remote atoll in the Maldeves where manta rays gather for a few weeks every year.
Episode 2
Sat, Feb 22, 2014 27 mins
Bird observes bull sharks off the Mexican coast; and visits NASA's Neutral Buoyancy Lab in Houston, where astronauts train for space walking in a pool that's about half the size of a football field.
Episode 3
Sat, Mar 1, 2014 27 mins
The endangered Hawaiian monk seal; injured military veterans who learn to scuba dive as part of their physical therapy and healing; the Great Annual Fish Count off the coast of Massachusetts.
Episode 4
Sat, Mar 8, 2014 27 mins
A visit to the Florida Keys examines artificial reefs made from ships that were intentionally sunk. Also: a freediving lesson in Bonaire from world-champion freediver Karol Meyer.
Episode 5
Sat, Mar 15, 2014 27 mins
Efforts to save the sturgeon in New York's St. Lawrence River by rebuilding their spawning habitat are examined. Also: an underwater farm in Key Largo, Fla., where coral is grown.
Episode 6
Sat, Mar 22, 2014 27 mins
A visit to the Mystic Aquarium in Connecticut spotlights beluga whales, including how they're trained and cared for. Also: a 400-foot-deep blue hole located on Andros Island in the Bahamas; a playful pod of spinner dolphins off the Hawaiian coast.
Episode 7
Sat, Mar 29, 2014 27 mins
Aquarius Reef Base, the world's only undersea lab, is visited. Also: the world of skates and rays.
Episode 8
Sat, Apr 5, 2014 27 mins
An underwater cave system in a remote part of Andros Island in the Bahamas is explored. Also: the world of sponges.
Episode 9
Sat, Apr 12, 2014 27 mins
How whitetip reef sharks hunt. Also: the kelp forests off the coast of Catalina Island; and shipwrecks on the St. Lawrence River.
Episode 10
Sat, Apr 19, 2014 27 mins
The Queen Anne's Revenge, which was the pirate Blackbeard's ship, off the coast of North Carolina; manta rays that feed off the Kona coast in Hawaii, including one that has been coming to the feeding site since 1979.
Episode 11
Sat, Apr 26, 2014 27 mins
The Season 4 finale spotlights underwater invasive species and their effect on the environment; and a special submarine that dives 1000 feet below the surface.