An upscale New Jersey home is at the center of a spine-tingling mystery. A stalker known only as ‘The Watcher’ terrorized the homeowners with a series of chilling letters. Derek and Maria Broaddus bought the house in the town of Westfield for $1.3 million. The first ‘Watcher’ letter arrived three days later. Now, the disturbing true story is being told in the Netflix drama series, “The Watcher,” starring Naomi Watts.