In the episode, Jake and Charles investigate a case from Hitchcock and Scully's younger days to determine if the two older detectives are withholding stolen cash.
Due to Holt's campaign against John Kelly, the Commissioner closes off the lower level and forces most of the departments to work in a tight space, leading Amy and her officers into conflict with Terry and Rosa.
The episode cuts to the present day with Captain Holt (Andre Braugher) calling Jake Peralta (Andy Samberg) and Charles Boyle (Joe Lo Truglio) into his office to tell them that Hitchcock (Dirk Blocker) and Scully (Joel McKinnon Miller) were contacted by someone in Internal Affairs who has reopened the case.
Hitchcock and Scully tell Jake and Charles that Marissa was their criminal informant in the mafia and that they stole the money for her after their captain refused to place her in witness protection.
Costa gets hold of a gun and fires shots at Marissa, but Hitchcock and Scully jump in front of her, stopping the bullets with tubs of sauce that they strapped to their bodies.
According to Nielsen Media Research, "Hitchcock & Scully" was seen by an estimated 2.83 million household viewers and gained a 0.9/5 share among adults aged 18–49, beating The Good Place and Gotham but behind Law & Order: Special Victims Unit and The Big Bang Theory.