Given that Candi is talking about dreams, I thought that you might like these documentaries:
While You Were OutA set of two audio documentaries from 2006 about the history of sleep and our best guess to the science. Each doc is about an hour long.
WARNING: First doc automatically plays as soon as you land on the site.
The Mind At RestA discussion from Dec 2013 on the science behind sleeping, dreaming and day dreaming. Available as audio and/or transcript. Audio runs for approx 30 mins.