Frank orders everyone to help investigate when NYPD Deputy Chief Donald Kent and his wife are gunned down in what appears to be a gang hit.
Marnie goes for a walk after an argument with Desi, and has an unexpected run-in with someone from her past.
Police chief Kevin Garvey tries to maintain a sense of normalcy in his strained community. Meanwhile, Tom Garvey gravitates toward a cult, and tension in Mapleton escalates.
Company policies result in a shortage of critical supplies and an eventful trip to a prison convention. Piscatella begins a new anti-gang initiative.