In the second season, there will be a dead end, as Holden proposes a bold plan to exclude the killer. Meanwhile, Bill's family faces more confrontations during that period, and Wendy will be completely angry because her job is starting to shift again. On the other hand, Holden's plan to narrow the suspect's pool seems to be heading in a completely inappropriate direction and Wendy is rethinking her relationship again.
If any viewers were worried that Mindhunter's central conceit of killer interviews (I mean this in the literal sense) and cold cases would eventually grow stale, Fincher's opening act for Season 2 quickly dispels those concerns.