: The HAZMAT team eventually confirms the powder is harmless baking powder (or otherwise non-toxic), and the lockdown is lifted. Brooklyn Nine-Nine recap: 'Lockdown' - Entertainment Weekly
In , Jake Peralta is left in charge of the precinct on Thanksgiving while Captain Holt and Terry attend a charity event. After Boyle accidentally opens a package containing a mystery powder, the precinct is placed under a HAZMAT quarantine. Survival Guide for a Precinct Lockdown [S2E7] Lockdown
: Following Amy’s advice, Jake eventually regains control by dropping the "fun boss" persona and threatening to arrest anyone who challenges his police authority. : The HAZMAT team eventually confirms the powder
: Boyle and a few others perform Beyoncé's "Single Ladies" dance to entertain the precinct, while a lawyer attempts stand-up comedy to lower tensions. The Terry and Holt Subplot Survival Guide for a Precinct Lockdown : Following
: Jake initially tries to keep spirits high by granting everyone's demands—such as excessive food and entertainment—which leads to a loss of authority.
: A less aggressive, more passive group.
: Jake's mistake was privately telling a lawyer that the powder's toxicity was unknown; the lawyer immediately informed the crowd, inciting a "mutiny".