When Flack uses the translation device on the train, the device identifies the spoken language as Russian even though the man speaks Bulgarian.
The inhabitants of Manhattan at the time of European arrival were the Lenape. The Montequans are an invention of the writers.
Fiction: The team traces the origin of the gunshot by focusing a laser from the point of impact through the window on a straight line, which pinpoints the origin of the gunshot to an apartment. Fact: Bullets don't travel in a straight line, they travel in an arc.