Person of Interest2011

Harold Finch:
I grew up during the Cold War When computer networks were just a gleam in the eye of the department of defense. Things seemed more black and white then. Arpanet was the new frontier. Till a kid with a homemade computer turned the whole thing inside out. All I'm saying is It's a new era now, and things are about to get really weird. So you should keep your code close to your vest. And pick your friends wisely. [Hands him a paper] Pi. The first 3,000 digits. My number's in there somewhere. You're smart, you'll figure it out.

Caleb Phipps:
Wait, uh, the hacker. The one who got away? How'd you know he did that with a homemade computer? I've read all that research. No one's ever mentioned that.

Harold Finch:
I must have heard it somewhere.