What makes a film terrifying enough to make us jump? Leigh Whannell (Saw, Insidious) explains it all. We then examine immersive haunted houses, guided by one of the field's most unique creators.

The Nightmare's Rodney Ascher shows us how he turns his vivid childhood traumas into adulthood art. Then, a sleep specialist gets into the science of sleep paralysis, hallucinatory demons and all.

Elijah Wood's acclaimed company SpectreVision rips into the heart at the core of even the most provocative genre films. Plus, a doctor has her patients strap on VR glasses to confront their fears.