Marvel’s Netflix shows—Daredevil, Jessica Jones, and Luke Cage—all take place in the same version of New York City. It’s gritty, it’s prone to ugly violence, and you’re more than likely to encounter a nurse named Claire Temple. And sometimes the links are so subtle, casual viewers might not even notice.
Source: io9 – Daredevil’s Charlie Cox Explains How Tiny Details Tie Marvel’s Netflix Shows Together