Person of Interest2011

Harold Finch:
When the phone company puts in your wi-fi, the password is your phone number. Most people never even change it. The other ones might actually take a minute. Once we're in, we can turn every webcam, nanny cam, security system, and laptop on the network into our eyes and ears.

John Reese:
Just like the machine.

Harold Finch:
I suppose If one apartment building were the entire world.

John Reese:
[Looks at a screen] Well, Lily the cook seems to be dating Rick from the penthouse.

Harold Finch:
Hmm.

John Reese:
[Looks at another screen. There's a very fit woman doing a fitness routine] And Amber in 714 is... healthy.

Harold Finch:
Somehow I doubt that's what alerted the machine.