After a storm wrecks the Aquarium tide-pool's research lab, Grant Roberts (Donnelly Rhodes) takes Nicole's (Ocean Hellman) science class to the tide-pool lab to gather new data.
A BC Hydro crew finds an intact fossil of a fish with legs. When Grant learns of the discovery he thinks the animal could be the "missing link" in the evolutionary chain. Grant takes Jonah and his friend Martin on a trip to study the fossil. Martin's father Don is a famous biologist who also joins the crew. The expedition proves to be an opportunity to study the distant past and for an estranged father and son (Don and Martin) to renew their relationship.
An old friend and a flying buddy come to visit J.L. in the tool shed he gets an electrical shock. J.L's plane has engine problems. Jonah and Nicole continue on with J.:L's friend who has a heart attack. Nicole is forced to fly plane back
a dying sea otter nurses its newborn pup. Grant tries an experimental drug to try to prolong the otter pup's mother's life. Will he succeed ? or is there another option?
Opposed to logging in a valley, Jonah and his friends take matters into their own hands. Grant is put on a committee as a person who also opposes logging in the valley.
Driven by hunger, a wild cougar descends on Danger Bay, frightening the residents. Grant, Donna, Jonah and Nicole work with wildlife authorities to trap and move the animal while local hunters armed to the teeth are intent on destroying it.
Jonah is hired by Jim Peterson to plant seedlings on a clear-cut mountain. While working with the crew, Jonah faces both a professional and personal challenge. A bighorn sheep herd is sick and needs to be treated by Grant for a hookworm infestation. Meanwhile the nasty supervisor Reid thinks Jonah is some kind of saboteur and continually incites him into a physical showdown.
Grant and Jonah aren't communicating well and the arrival of Doug (Winston Rekert) complicates things even more while the three are examining an otter sanctuary.
A Rock Star films a rock video at the aquarium. Nicole auditions to become one of the dancers in the video and her friends become jealous of her when shes picked.
Scientists working to create a new species of Chinook salmon create a giant-sized fish capable of devastating the local marine life. Not only is it huge and hungry, but it also carries a drug-resistant disease.
