Excellent suspenseful cyber crisis story. What sets this show apart is the use of analogous dramatized recreations of hacking and coding. When the show would normally be watching people typing or even examining code, we see the person at the keyboard in a fantasy world (that looks like the real world) wearing a toolbelt. They then perform physical actions in that fantasy world corresponding to the tasks they are performing in the real world with keystrokes. I know mine isn't a perfect verbal description, but it makes cyberwarfare much more accessible to non-technical viewers.
The acting performances are excellent, even Maisie Richardson-Sellers's performance as an NSA employee [spoiler]whose lust overcomes her reason, bogging down the storyline tremendously as Saara Parvan is distracted from vital work by a destructive seduction[/spoiler].