Nova: Season 11, Episode 5

11 - 5: Visions of the Deep: The Underwater World of Al Giddings

Is there a cure for paralyzing spinal injuries? Most neurosurgeons are doubtful, pointing to the central nervous system's most apparent inability to heal itself. But others dispute the point. NOVA explores the debate, the hopes for a cure and recent breakthroughs to help paralyzed patients.