Closed-captioned ; Described video for the visually impaired.
Note
Title from disc label.
Originally broadcast on NOVA in 2009.
Summary
What are dreams and why do we have them? NOVA joins the leading dream researchers as they embark on a variety of neurological and psychological experiments to investigate the world of sleep and dreams. Delving deep into the thoughts and brains of a variety of dreamers, scientists are asking important questions about the purpose of this mysterious world we escape to at night.