This 3-part blue chip natural history series reveals the rarely-seen magic along the longest river system in the United States, and the drama of the creatures that are drawn to the Mississippi for survival.

This journey down the Mississippi River starts at its headwaters during the peak of fall, as the nearby wildlife prepare for the colder months ahead.

Record flooding creates serious challenges for animals along the Mississippi River.

The joining of the Mississippi with an even more flooded Ohio River creates a dangerous situation as a wall of water races toward the Gulf of Mexico.