I'd heard of Kali (but forgotten). Right now I still game just a little too much to fully make the switch to Linux, and don't have a spare machine on which to put it. I keep hoping I'll be able to build a new desktop one day soon, but that seems unlikely absent a dramatic shift in my personal finances.
As for the show, I feel like I should've said more, but it's tough to talk about without spoiling the plot. The hacking bits felt right, even though I don't really have the technological chops to say more than that. And I agree they did the disconnect well, even if a tad predictably.