In the previous episode of NBC’s Brooklyn Nine-Nine, Jake, Amy, and Captain Holt came back to the whole precinct working on the same floor, thanks to Commissioner Kelly.
Holt and the Nine-Nine rescued Jake, Boyle, Hitchcock, Scully, and Marissa instead of going on TV.
In Brooklyn Nine-Nine season 6 episode 2, the effects of everyone crammed together take their toll, and we catch a glimpse of Hitchcock and Scully in the 80s.
Captain Holt made them realize how petty they were being when they were really at war with Commissioner Kelly.