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?