The real Broaddus couple purchased 657 Boulevard in June 2014 for $1.35 million and sold it five years later in July 2019 for $959,000.
Based on the true case, beginning in 2014, of the Broaddus family, who were spied on, threatened, and ultimately driven to sell their home & leave the town they loved, by a mysterious stalker who identified themselves only as "The Watcher" in the letters sent to Mr & Mrs Broaddus.
The John Graff murders shown in the show bear a striking resemblance to the John List murders which also occurred in Westfield but at 431 Hillside Ave instead of 657 Boulevard.
The character of John Graff is loosely based on the real life person John List who murdered his family in Westfield, NJ in 1971 in a very similar manner.
In episode 2, the family stays at the Tides Motor Inn, which is located in Bayville NY, 60 miles from Westfield NJ.