Robin is ready to ski down a mountain. Miguel and Kathy, who have never skied before, spend their time witnessing a snow-making machine. All three discover a geologist at the mountaintop who explains the nature of glaciers.On location, Miguel flies in a weather plane. Robin goes to the Rocky Mountains to find the origin of the Colorado River.A mock commercial for water, used as a running thread through Episode 100, makes its first appearance.ANIMATION: The water cycle.THE BLOODHOUND GANG: ""The Case of The Locked Safe,"" a one-shot surprise that trains the gang to work under pressure. Can they find the new combination to the lock?

A dry tour of the solar system shows no substantial water on the other planets. Back on Earth, water contains just about all life.Miguel visits the Okefenokee Swamp, hoping to see an alligator.Robin shows Paco how to start an avocado plant. Paco then tries to help a cactus by giving it excess water. On location, Paco learns how animals and cacti survive in the desert with little water.BIOGRAPHY: Eloy Rodríguez visits the desert to study how its natural resources can help man and industry.THE BLOODHOUND GANG: ""The Case of the Computer Caper, Part One."" (Recycled from Episode 82.) When the Twins Research Foundation finds several computer files stolen, the gang is called to help follow the directions in the ransom note. Skip must drop the ransom money in a trash barrel at the park.

Miguel helps Robin complete a homework project before heading to a harbor on the Hudson River. He and Kathy are worried that a houseboat may be sinking. A marine biologist tells them the difference between an estuary (like the Hudson) and a delta (like the Mississippi).In New Orleans, Kathy discovers the channels and levees that practically crisscross the area. Two ecologists inform her how important the Mississippi is to New Orleans, and how man and Nature must work together.Robin ventures to a region poisoned by acid rain, then labeled ""New York State's problem.""THE BLOODHOUND GANG: ""The Case of the Computer Caper, Part Two."" After a cold snap the night before, Vikki and Ricardo stake out the trash barrel in question. A strange lady pours water into the barrel a couple of minutes before Skip arrives with the money. Once the trash is dumped into a garbage truck, the order goes out: ""Tail it.""

Miguel discovers a leak in the water pipes and tries valiantly to fix it. Kathy discusses Lake Mead and Hoover Dam, which supply water and electricity for Las Vegas. Robin and Jackie examine the Grand Canyon from two different angles.Film insert: Tracing the New York City water system.ANIMATION: The creation of the Grand Canyon.THE BLOODHOUND GANG: ""The Case of the Computer Caper, Part Three."" Vikki discovers that the woman who poured water in the trash can, is left-handed. Looking closer at the pictures, Ricardo realizes that the money – wrapped in plastic – froze to the bottom of the trash barrel. Back at the park, the gang is surprised to hear from a hot dog vendor that the ""lady"" came back for the trash can. In truth, the culprit is a man. (Concludes in next episode.)

Paco, Kathy and Robin set up an aquarium to surprise Miguel. Two scientists from different fields lead Robin to study bears in the Minnesota winter. They take samples of bear blood to aid human health problems, such as kidney dialysis.Film insert: Where there's water, there's life, as demonstrated in human blood vessels and kidneys.THE BLOODHOUND GANG: ""The Case of the Computer Caper, Part Four."" With the barest of clues, a restaurant's souvenir pen, the gang traces the man who stole the computer files.