Ian Quinlan

Erin's case against cartel member Carlos Munoz intersects with a husband-and-wife domestic abuse call that Jamie handled, but when the wife is murdered all hands are on deck, the husband becomes the prime suspect.

Danny and Baez respond to a call that their psychic friend, Maggie Gibson, has been stabbed.

Reagan family tensions run high when Frank and his grandson, Joe Hill (Will Hochman), contend with a grievous insult to the memory of Joe's father, Joe Reagan.

Frank causes family tension when he assigns Jamie to guard Danny after a hit is put on him, and when Frank tries to stop his cop grandson, Joe Hill (Will Hochman), from seeking revenge after he's attacked. Also, Eddie gets a hostile new partner, and Erin's moral character is attacked by the defense when she tries an old murder case related to her boss, the D.A.

Danny and Jamie join forces with their nephew, Joe Hill (Will Hochman), when Jamie and Joe's search for an undocumented, trafficked teenage girl converges with Danny and Baez's investigation into the murder of a woman in witness protection. Also, Frank and Erin butt heads when Frank calls out the district attorney's office for instituting a new rule that classifies armed robbery as a misdemeanor, a mandate that has immediate ramifications for Eddie and her partner.