A Florida housewife named Katie has an unusual affliction. Occasionally, for no rhyme or reason, thin pieces of gold colored foil appear spontaneously on her skin. Paranormal researchers are stumped. In this hour of To the Best of Our Knowledge, exploring magic. From tales of the paranormal to the mathematics behind magic ricks. A stage magician-turned-mathematician explores the mysteries of probability. And, a Harry Potter story for grown-ups – Lev Grossman reads from his new novel The Magicians.