Unleashed on Netflix nearly two years ago, the first season of Mindhunter was a gloriously detailed period procedural about the creation of the FBI’s Behavioral Science Unit (BSU) and its pioneering criminal profiling methods, based on the experiences of real-life FBI profiler John E. Douglas, who helped build the first centralized database on serial killers by interviewing dozens of them in prison in the late ‘70s. In the hands of creator Joe Penhall and executive producer/director David Fincher, Douglas’s story became an enthralling descent into hell that also felt like the culmination of Fincher’s career-…