In the third season, Dorchester is specified as being "by the Hudson River in Somerset County". The third season was mainly filmed in New York State, especially in the town of Hartsdale, New York, in Westchester County. Some filming for the third season was completed at the Hartsdale train station, rebranded as Dorchester. Crews were also filming in summer 2019 at Hastings-on-Hudson, New York, at the Found Herbal Apothecary Herb shop, and at the Hastings Center Diner. A car chase was shot in Queens, New York, and scenes set at the fictional Briarton school were shot at the Synod of Bishops Russian Church on East 93rd Street. Other New York City locations included the STK Midtown Steakhouse and the City College of New York, both in Manhattan.
