Brooklyn Nine-Nine: “The Mattress”
(Episode 3.07)

For Brooklyn Nine-Nine’s last couple of episodes, Jake and Amy have had the luxury of acting like a couple without needing to prove their couple bona fides. They’re an item, period. It’s true that “Halloween III” put a teensie bump in their road, but Jake’s paranoia over Amy’s allegiance in his prank campaign with Holt didn’t revolve solely on their relationship status. Holt, after all, shared in Jake’s distrust, and even when the writing circled around to deal with personal affairs, the story wasn’t about Jamy; it was about Jake and Holt, with Amy’s feelings playing only a small (if pivotal) role in their frivolity. The lovers’ tiff acted like so much window dressing.
In “The Mattress,” though, the development of Jamy stands front and center, with another Rosa/Terry subplot and a Boyle/Holt dust-up buttressing the episode’s primary arc. Normally, secondary and tertiary threads don’t have an impact on Brooklyn Nine-Nine’s main narrative; they exist outside of its scope instead as diversions, meaningful or otherwise, that enhance that narrative without being subsumed by it. That’s half true of “The Mattress.” Rosa grows as a character thanks to a well-intentioned, but bungled (but still ultimately successful) Terry intervention, and that growth occurs off in the margins. Holt, however, learns a valuable lesson from Gina after an incident with Boyle, which empowers him to offer equally valuable advice to Jake.
Boy does Jake need it. It’s traditional that in any romantic television pairing, one of the two involved parties has to take up the mantle of “oaf,” and in the partnering of Jamy, that clearly must be Jake. Amy has been crashing at his place (queue quippy innuendos from the audience and supporting cast alike), and she hasn’t gotten a lot of sleep, because Jake’s mattress keeps her up all night. He’s sleeping on a bed that, from the sounds of it, is composed mostly of lumps rather than cushioning, and Amy is trying her damnedest to catch up on sleep to bridge her snooze deficit. She’s also trying to convince Jake to buy a new mattress, which is sort of like leading a very stubborn horse to water. When they end up working a case together, promising Holt that their relationship won’t pose a problem to the investigation, they end up in a quarrel to the surprise of exactly no one.