IDU: Do ghosts really exist?

Ghost stories are almost as old as time itself whether they are benevolent beings that help guide us or sinister spirits to cause harm or frighten us, people love talking about the idea of ghosts. Well, are they real? What do we really know about paranormal phenomena? Paranormal investigator and co-star of “Kindred Spirits” Amy Bruni joins William Shatner on this week's episode of "I Don't Understand" to talk aobut if ghosts really exist.