What are dreams and why do we have them? Are they a window into a hidden realm within us? Science is only just beginning to understand. NOVA joins the leading dream researchers and witnesses the extraordinary experiments they use to investigate the world of sleep. From human narcoleptics to sleepwalking cats, from recurrent nightmares to those who can't dream, each sequence contains a vital clue to the question these scientists are pursuing: Why do we dream?

NOVA Season 37 Episodes...

• s37e01 - Darwin's Darkest Hour
• s37e02 - Hubble's Amazing Rescue
• s37e03 - Lizard Kings
• s37e04 - Becoming Human Part 1: First Steps
• s37e05 - Becoming Human Part 2: Birth of Humanity
• s37e06 - Becoming Human Part 3: Last Human Standing
• s37e07 - What Are Dreams?
• s37e08 - What Darwin Never Knew
• s37e09 - Killer Subs in Pearl Harbor
• s37e10 - Building Pharaoh's Ship
• s37e11 - Riddles of the Sphinx
• s37e12 - Ghosts of Machu Picchu
• s37e13 - Extreme Cave Diving
• s37e14 - The Pluto Files
• s37e15 - Telescope: Hunting the Edge of Space - The Mystery of the Milky Way
• s37e16 - Telescope: Hunting the Edge of Space - The Ever Expanding Universe
• s37e17 - Mind Over Money
• s37e18 - Mt. St. Helens Back From the Dead

NOVA Show Summary

Seen in more than 100 countries, NOVA is the most watched science based television series in the world and the most watched documentary series on PBS. It is also one of television's most acclaimed series, having won many major television awards, most of them many times over.