It's only recently that we have had Netflix so we were not even aware of the series, Mindhunter, until yesterday.
We are on episode 4 right now and it is extremely compelling, we are thoroughly enjoying the show and how the characters are developing into what they eventually become, the modern behavioral science unit of today.
I was very disappointed to find that there are only 2 seasons. Too many excellent series get cancelled because they didn't give it enough time.