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All Seasons

Season 1

  • S01E01 Invaders

    • April 20, 2005
    • PBS

    Across the world, plants and animals are silently finding their way into places where they don't belong. These interlopers, called invasive species, have enormous powers — they spread disease, they devour our buildings. Some are destroying the very land under our feet. Odds are these species that evolved in one place and now live destructively in another may have even infiltrated your own backyard.

  • S01E02 The One Degree Factor

    • April 20, 2005
    • PBS

    Dust clouds are building high over the Atlantic. An entire population of caribou is declining, while other species are pushed to the limits of their physical survival in the oceans. A respiratory illness, once uncommon among children in Trinidad, is now widespread. Amazingly, many scientists now believe these disparate phenomena may be linked to global climate change.

  • S01E03 Predators

    • April 27, 2005
    • PBS

    Around the world, from the forests of Venezuela to Yellowstone’s majestic wilderness to the Caribbean’s coral reefs, researchers are discovering predators play a vital role in the health of our natural systems. Knowing this, should we learn to live with predators? Can we?

  • S01E04 Troubled Waters

    • April 27, 2005
    • PBS

    Frogs are vanishing in America’s heartland. Canadian beluga whales are mysteriously dying in the Saint Lawrence River. Swarms of sea stars are overrunning parts of Australia's Great Barrier Reef. Are these signals that something is amiss in Earth’s water – from our marshes to the sea? Has water become a massive delivery system for pollutants?

Season 2

  • S02E01 Dangerous Catch

    • April 23, 2008
    • PBS

    Plenty of fish in the sea? Not anymore. As wild supplies dwindle, the long hidden ties binding all life to the ocean are clearly coming into view. Can we ignore these powerful connections? What can we do to protect the ocean, ourselves and our future? Our massive demands on the ocean’s bounty impacts life far beyond the shoreline: bushmeat hunting is on the rise in Ghana while in Namibia; fishing grounds struggle to recover as putrid fumes explode from the ocean depths and poison the waters; and radical new fish farms are sprouting up from Puerto Rico to Canada. Across the globe, all life is feeling the effects of overfishing. Can we protect fish in time to safeguard the ocean, life on land and ultimately ourselves? Find out how we all can make a difference.

  • S02E02 Dirty Secrets

    • April 23, 2008
    • PBS

    Something is amiss in our global world water supply: Striped bass are succumbing to flesh-eating bacteria in Chesapeake Bay; seabird chicks are starving in Hawai‘i; coral reefs are weakening under a growing assault of invisible contaminants and an increasing variety of aquatic animals are showing signs of developmental disorders. Experts and citizens are racing to find clues to the causes—and the solutions. Find out how we all can make a difference.