With Sacagawea interpreting, guiding, and even rescuing equipment, Lewis and Clark experience true wilderness and encounter many new Native Americans. This program details their route, their disappointment at not finding a continuous water route to the Pacific, and their luck that Sacagawea’s lost tribe had the horses they needed to survive the great mountains. Viewers experience her emotional reunion with her brother, who is now the chief, and her wonder upon reaching the Pacific Ocean.