I would second this. The way the AI was pervasive and controlling, without ever being obvious / well-known.
Definitely an underrated show, and one I suspect that more or less nailed its predictions of how AI will eventually be used/abused to control and manipulate populations.
It also nailed Snowden leaks before they actually happened!
I also recommend watching Person of Interest. It's a really in-depth discussion of issues a superhuman AI could create within the level of technology we enjoy today, as well as ethical problems relating safe AI and people's right to determine their own fate.