Paranormal investigators Jack Osbourne and Katrina Weidman travel the world to explore the sinister locations associated with being gateways to the underworld.

Don Wildman recounts a tragic expedition. Plus, he reveals evidence suggesting that Harry Houdini was murdered and investigates a shapeshifting creature.

From a bridge in Vermont where a jilted teenage girl leapt to her death to a Tennessee intersection, historians and witnesses recount tales about haunted towns.

Police officers, paramedics and other first responders reveal their true encounters with the paranormal while on duty. Not only do these cases defy explanation, they terrify even the most seasoned of men and women who have devoted their lives to serve and protect the living.