“It’s not like there’s some magical machine that makes identical copies of things.” To its eternal credit, Mad Men got the single worst line of dialogue in the entire series out of the way in its pilot episode. Don Draper’s brief aside about the state of the art in office equipment functions as a gag only from the perspective of its 2007 audience, at the expense of its 1960 characters. What we know, and what Don doesn’t, is that of course there are magical machines that make identical copies of things, or that there will be eventually. The poor sap has the temerity not to have journeyed via time machine to an era where photocopiers are a thing. Joke’s on you, buddy!

I thought of this line a lot while watching Mindhunter, Netflix’s new serial-killer procedural from writer-creator Joe Penhall and producer-director David Fincher. The difference is that while Mad Men relegated its “look at these troglodytes who haven’t even heard of Xerox yet” hindsight to one brief, bad joke, it’s Mindhunter’s entire premise.

Based on the influential true-crime book Mind Hunter: Inside The FBI’s Elite Serial Crime Unit by Mark Olshaker and John E. Douglas, and featuring analogues for Douglas and his fellow Fed Robert K. Ressler, it chronicles the birth of criminal profiling and the concept of the serial killer as we know them, during an era when law enforcement’s skepticism of such notions—and of psychology in general—was ingrained and endemic. In other words, it’s a war story written from the perspective of the winners, one which enlists its audience as recruits for the retrospectively inevitable victory. That’s the problem, really: It’s a tale of bone-deep uncertainty in uncharted territory, told with the quiet confidence of a sure thing.

I’m covering the first season of Mindhunter for the A.V. Club, where believe it or not I’ve never written about television before! Here’s my review of the premiere, which helped me realize there’s basically a whole subgenre of “based on a true story” that I don’t care for: the origin of something everyone thought was wrong but which we in the audience know turned out to be right. Also, you gotta hear the dialogue in this thing. It’s like an alien wrote it.