[s1e21] — Unsolvable

"Unsolvable," the 21st episode of Brooklyn Nine-Nine season one, follows Jake Peralta as he breaks his obsession with a cold case involving missing person Nate Dexter. The episode, which aired on March 18, 2014, features subplots regarding Captain Holt's secret presentation prep and Charles Boyle's relationship troubles, along with a memorable, fabricated rap by Jake. For a detailed breakdown, read the TV Tropes Recap . Brooklyn Nine-Nine S1E21 "Unsolvable" Recap - TV Tropes