What are Demons?

Demons seem to be all the rage today.  Now, is this due to the
popularity of paranormal reality shows that seem to have demonic
interactions every week or are demon encounters on the rise?
Episode #40 is the start of a series of podcast, where I'm going to
dive deep into the world of evil, so we all can get a better
understanding.  This episode is a taste of what's to come, and
I cover what Demons are.