The list of our fears is seemingly endless. But when intense fear becomes dreadful horror, accompanied by an irregular heartbeat and panic attacks - it might be symptoms of phobia. There are at least a hundred common phobias, including the fear of spiders, snakes, elevators, water, gossip and numbers. Learn how phobias are being diagnosed, categorized and treated. Discover what terrified Harry Potter and Count Dracula and what spooked the master of suspense - Sir Alfred Hitchcock. Listen to our special series “Phobias: What Makes Your Blood Run Cold.”