But not just entertainment. This documentary certainly stands out because of the number of female experts in it. That is still rare.
(I seem to remember that North Korea as behind the Sony hack was later disputed or doubted, however. Either North Korean hackers got careless at one point by skipping encryption at some point, I seem to remember, or someone made it look that way.)
Also, the information given about Tor in this documentary is not complete. Your internet provider can still see what you do.
In the earlier days of the internet, there used to be a site where you could track which transatlantic cable your e-mail was using or something like that. I also remember an instance when e-mail broke down for a day or so because there was a problem with one of those cables. In those days, a lot of services were still based in the US, so your message to someone in Germany might even have to go through a server in the US, stuff like that.