Changing Seas

CHANGING SEAS takes viewers on an exciting adventure to the heart of our liquid planet. The documentary series offers an unprecedented look at how oceanographers and experts study earth's vast underwater wilderness, while shedding light on how over-fishing, global climate change and pollution threaten ocean resources.

Sun, Apr 19 6:30 A.M. Majestic Mantas     NHPBS (11.1)

The remote Revillagegdo Archipelago off Mexico's Pacific coast is a hotspot for giant mantas that interact with awe-struck scuba divers.

Sun, Apr 26 6:30 A.M. Dolphins: Breaking The Code     NHPBS (11.1)

Dr. Denise L. Herzing has dedicated her career to studying a community of free-ranging Atlantic spotted dolphins that live in the shallow, crystal clear waters of the Bahamas Through non-invasive, in-water observation; she researches the animals' social structure, behaviors and communication.

Sun, May 3 6:30 A.M. Cryptic Critters     NHPBS (11.1)

Deep underwater, on a shipwreck near Key West, lives a tiny potential new threat.

Sun, May 10 6:30 A.M. Lords of the Wetlands     NHPBS (11.1)

While American crocodiles are recovering in parts of their range, their future looks bleak in Jamaica.

Sun, May 17 6:30 A.M. Fishing The Flats for Science     NHPBS (11.1)

Flats fishing is popular with recreational anglers in the Caribbean and the Florida Keys.

Sun, May 24 6:30 A.M. The Cordell Bank: A National Treasure     NHPBS (11.1)

California's north-central coast is famous for its natural splendor.


Watch Changing Seas - Clips, Episodes & Previews


Changing Seas By Episode



NHPBS Over-the-Air Broadcast

WENH-TV Ch. 11 Durham

WLED-TV Ch. 48 Littleton

WEKW-TV Ch. 18 Keene

W50DP-D Ch. 50 Hanover

W34DQ-D Ch. 34 Pittsburg

Cable and Satellite Channels


NHPBS Five Channels

NHPBS - 11.1

Explore - 11.2

World - 11.3

Create - 11.4

Kids - 11.5

All of our channels and NHK World Japan are streaming LIVE ONLINE and on the PBS App, available on most devices.

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Community Impact

NHPBS NHPBS Passport Passport

Bring Them Home | Bring Them Home - ASL
Ask This Old House | E17 | Lead Testing, Hillside Steps | Ask This Old House
This Old House | E17 | Suburban Victorian | Foot Traffic
The Forsytes | Episode 1
History with David Rubenstein | Ken Burns
The Making of The American Revolution | The Making of The American Revolution
The Count of Monte Cristo | Episode 2: The Castle
Nature | The Greatest Adventure | Parenthood
Finding Your Roots | Artistic Roots
Antiques Roadshow | Coastal Maine Botanical Gardens, Hour 2
American Masters | Sun Ra: Do The Impossible [EAD]
Black and Jewish America: An Interwoven History |
NOVA | Mammal Origins
Austin City Limits | Leon Thomas
Secrets of the Dead | The Quest for Camelot
Safe Harbors: Lighthouses of Maine | Safe Harbors: Lighthouses of Maine
Raise Your Head Up: Freedom Colonies in America | Raise Your Head Up: Freedom Colonies in America
A Fuller Education | A Fuller Education
North to New York: The Great Migration in NY's Capital Region | North to New York: The Great Migration in NY's Capital Region
Bigger than Africa | Bigger Than Africa
The Puzzle Lady | Episode 1
All Creatures Great and Small | Episode 1: Gathering the Flock
American Experience | Bombshell
From That Small Island: The Story of the Irish | New Worlds
London's New Year's Day Parade | The London Parade 2026
Rome New Year's Day Parade 2026 | Rome New Year's Day Parade 2026
Bookish | Slightly Foxed, Part 1
Happiness | Episode 1
Great Performances | Nutcracker from English National Ballet
Miss Scarlet | Episode 3: The Delivery