The Roberts reminisce about their six years in Danger Bay.
An ailing monkey is discovered in the Amazon gallery.
Tim's scheme jeopardizes the aquarium's reputation.
Grant and Jess try to save a pond from highway builders.
Nicole works in a camp for blind youths.
Jess picks up a distress call on the short-wave radio.
Jonah and Nicole uncover a native shrine in the rain forest.
J.L. learns her father is going blind.
An escaped convict hijacks J.L.'s plane.
Grant's niece falls in the ocean.
Jess helps Dr. Rhinehart with cancer research.
Grant arrives at Jonah's dinner party with a pig.
A town blames wolves for lack of game.
Grant investigates sabotage at a fish plant.
Maggie Ferguson sells her farm to the power company.
Grant's niece stays for the summer.
Grant and George's expedition to a glacier turns sour.
Work interferes with romantic plans.
Jonah writes a scathing report.
A mysterious toxin puts J.L. into a coma.
Jonah's friend is paralyzed in an auto accident.
Jonah's new job arouses Emma's jealousy.
The Roberts search for a fallen meteor.
A convict comes to the aquarium.
An accident at sea tests Jonah and Nicole.
A psychic dog puzzles Grant.
A father and daughter try to live off the land.
Jonah tries to help a Vietnamese student.
Nicole studies sea lions on a remote island.
Grant investigates the grandfather of Nicole's classmate.
Nicole and Jonah befriend a sick elephant.
Grant helps a friend of Nicole's prove her innocence.
Jonah, J.L. and Grant stop poachers.
Jonah and Larry enter a car rally.
Jonah overcomes his fear of fire to save a girl.
Nicole pursues illegal toxic-waste trailers.
An exotic fish collection is willed to the aquarium.
Another scientist challenges Grant's credibility.
Nicole baby-sits newcomer Adam Berman.
Someone abducts an exotic monkey.
Grant is quarantined with chicken pox.
An exterminator jeopardizes the Urban Falcon Project.
A territorial crisis makes Grant late for his wedding.
Grant, Nicole and J.L. must land in a storm.
Grant receives an award from a company with unsound policies.
Nicole tries to convince poachers they are wrong.
A hunter mistakes a trapped narwhal for a unicorn.
Grant discovers a wounded eagle has been shot.
Nicole maintains a competitive edge and her principles.
Grant discovers a seal with an implant in its brain.
Nicole faces the challenge of climbing a rock face.
A Czechoslovakian student learns family is more important than defection.
A survivalist group damages a bird nesting area.
Grant investigates J.L.'s helicopter crash.
The gift of a priceless artifact brings trouble.
Jonah takes the blame after a friend kills a wolf eel.
Jonah becomes infatuated with his tennis instructor.
Grant's impatient assistant jeopardizes an experiment.
A poisonous frog escapes from the aquarium.
Nicole falls for a pilot who smuggles parrots.
A student interested only in results infuriates Grant.
The mother of Nicole's new friend is paralyzed.
Jonah ends up in jail after a night of partying.
Grant is not pleased with the Adopt-a-Pet program.
Jonah attempts to rescue a trapped seal.
A withdrawn girl opens up after nursing a sick coyote.
Dunbar and the Roberts vacation at a deserted resort.
Grant learns of a deadly fish created by gene-splicing.
Nicole befriends a misguided girl in her class.
Dunbar lets a rock star make a video at the aquarium.
Grant introduces a deaf boy to Mike the chimpanzee.
An aquarium employee makes a deadly medication mistake.
Jonah looks for otters and gets his leg caught in a trap.
J.L. and Nicole are invited to a horse ranch.
Grant quits his job to think after his mentor dies in Africa.
Tree planter Jonah finds an ailing bighorn sheep.
An elderly fellow tries to trade his performing seal.
An unexpected visitor scares Nicole in a storm.
Grant's old college buddy steals data from the aquarium.
Jonah and Nicole try to save a hungry cougar.
Grant and Jonah disagree about a watershed marked for logging.
J.L. considers adopting an orphan girl found hiding.
Grant risks his job to save a sick sea otter.
A virus threatens to wipe out an island of birds.
Nicole and Jonah's pilot has a heart attack in flight.
Discovery of a fossil strains a father-son relationship.
Jonah gets into a jam in his two-man sub.
Nicole learns her crush on Todd is not mutual.
A gold sculpture disappears during a fund-raiser.
Collector Lester Hupwell buys fake rare fish.
Grant helps salvage stolen nuclear fuel.
Dr. Dunbar's friend lives in a hollow tree in the park.
The family's pet otter swims into polluted water.
Grant quarantines a freighter with a sick Bengal tiger.
The president of China visits the aquarium.
Rustlers steal diseased cattle and head for the city.
Donna is bitten by a poisonous snake.
A bathtub race raises money for whales.
J.L.'s helicopter contains furs of endangered species.
Grant, Dunbar and J.L. crash-land in the mountains.
Nicole and friends deal with botulism in the wild.
Orangutan Ponga wrecks her cage at the zoo.
Doc and Jonah note acid rain and end up in white water.
An animal-rights protester kidnaps a sick seal.
Drug smugglers hold the aquarium staff hostage.
Trainee pilot Joyce joins Grant on a whale watch.
An Indian needs a tribal gift in order to come of age.
Outlaw logging is killing spawning salmon.
Doc, Jonah and Nicole seek a reported sea monster.
Doc thinks some unruly bears have mercury poisoning.
The aquarium's beluga whale gives birth to a rare male.
An adventurer's plan could boost the aquarium.
Aunt Grace's visit brings romance for Doc.
Jonah snorkels into toxic waste and loses his sight.
Doc trades jobs with a country veterinarian and takes Jonah and Nicole with him.
First a rare eel then smuggled computer chips turn up in the aquarium.
Doc and an ornithologist quash the exportation of endangered species.
Bjossa the killer whale finds a friend.
The aquarium needs Jonah; he needs tennis.
Doc, Nicole and Jonah look into a case of salmon poaching.
Doc looks frantically for the rabid dog that bit Nicole.
Doc Grant fights off a gang of mustang rustlers.
Doc and family meet trigger-happy poachers.