In 1995, singer Madonna attracts the attention of a dangerous man who comes knocking on her door.

Sportscaster Erin Andrews became the target in a twisted game to expose her most private intimate moments; Michael Barrett went from an average family man to a perverse stalker who tracked Andrews in hotels across the country.

The story of a woman gripped by the fantasy that she was romantically involved with David Letterman; a glimpse into the mind of a delusional woman suffering from the devastating condition of schizophrenia, and the story of her tragic demise.

Actress Gwyneth Paltrow tried to protect herself and her family from a relentless stalker who traveled across country to get close to her; Gwyneth's personal head of security provides exclusive insight into the private life of the terrified star.

John Hinckley Jr.'s obsession with a Robert Denison movie character gave him the deranged idea that murdering a president was the way to Jodie Foster's heart; renowned Forensic Psychologist Reid Meloy and author Del Quentin Wilber provide insight.

Actor Michael Douglas and his wife Catherine Zeta-Jones came face-to-face with their real life stalker, a crazed fan who took violence to new heights.