Joralemon Street (between Atlantic & Furman) as Roosevelt Drive Crash
Jamie Hallen's car crashes and is found by several of that week's Numbers.
Source: Person of Interest — Wikia
“Number Crunch” Filming Locations
Reese and Finch struggle to keep up when the Machine gives them four numbers at the same time and Mark Snow approaches Carter about her hunt for Reese.
Person of Interest episode “Number Crunch” was filmed in New York in the United States of America.
138 East 78th Street as Claire Ryan's Apartment (exterior)
Reese goes to investigate the newest Number only to find her already murdered.
Space Salon as Wendy McNally's Salon
Reese goes to Wendy McNally's salon and almost gets a haircut.
Source: Person of Interest — Wikia
Ducati Triumph New York as Ducati Dealership
Finch tracks Matt Duggan to a motorcycle dealership where he sees the Number get blown up.
Source: Person of Interest — Wikia
Flatbush Avenue (between Fulton & Livingston) as Carter Being Trailed
Carter is talking on the phone with Fusco when she realizes she is being trailed by the two CIA agents.
Source: Person of Interest — Wikia
Metropolitan Hospital Center as St. George Hospital
Reese heads to the hospital and sees Wendy McNally visiting her mother.
Source: Permit List
Battery Parking Garage as Hospital Parking Garage
Reese saves the two remaining Numbers and then has a confrontation with Mark Snow on the rooftop.
Source: Person of Interest — Wikia