[s4e20] The Slaughterhouse 📢 🔔

: The episode sets up a major series arc when it is revealed that Hawkins is actually a dirty cop who is robbing the banks herself. Subplots & Comedy

Jake Peralta and Rosa Diaz compete to join a prestigious task force called , led by their idol, Lieutenant Melanie Hawkins (guest star Gina Gershon ). [S4E20] The Slaughterhouse

: Amy struggles with her fear of authority, eventually culminating in a hilarious outburst directed at Captain Holt. Key Production Details Director : Victor Nelli Jr. Air Date : May 16, 2017 : The episode sets up a major series

: A comedic side-plot involves Captain Holt losing Amy Santiago's favorite fountain pen while his own is being repaired in Germany. led by their idol