Washington Square Park as Washington Square Park
Sherlock summons Watson to the park to talk about the use of carrier pigeons in their current case.
“Step Nine” Filming Locations
Elementary episode “Step Nine” was filmed in New York in the United States of America and London in the United Kingdom.
Trafalgar Square as Trafalgar Square
Sherlock holds up a sign in front of CCTV cameras in the square to contact Langdale Pike.