S13, EP13 "Past History"
Danny and Baez race against the clock to catch a serial killer targeting young women; Erin and Eddie clash when Eddie intervenes in a murder case and Erin's personal life; Frank must decide how to discipline his grandson.
S13, EP12 "The Big Leagues"
Danny reunites with childhood friend and a former criminal Mickey Patrick, who comes to him for help finding his missing fiancee; Anthony surprises Erin with one last stakeout before her run for district attorney.
S13, EP11 "Lost Ones"
Danny and Baez's investigation into the death of a chess hustler is complicated by interference from the victim's son; Jamie tries to make amends with a man he regrets putting away as a young officer.
S13, EP10 "Fake It' Till You Make It"
Jamie and his new intel team officer infiltrate a high-tech car smuggling ring; Frank faces off against the city's transit chief over a program that is causing officer injuries on the job; Eddie asks Danny to help her bust a cop impersonator.
S13, EP9 "Nothing Sacred"
Frank and his grandson, Joe Hill, contend with a grievous insult to the memory of Joe's father; Erin and Henry work together to bust a scammer targeting the elderly; Eddie's captain takes suspicious interest in her efforts to locate a stolen puppy.
S13, EP8 "Poetic Justice"
Danny crosses paths with a criminal from a previous case when he investigates a gang attack with a shocking motive; Frank and Mayor Chase butt heads over an off-duty cop who goes too far making a political statement.
S13, EP7 "Heroes"
Erin and Anthony clash when Anthony's daughter is the sole eyewitness to a fatal shooting; Frank wants to punish an off-duty copy for his inaction during an armed robbery; Danny and Baez investigate a violent mugging.
S13, EP6 "On Dangerous Ground"
Danny and Jamie clash over a gang-related shooting; Erin and Anthony search for answers when a lawyer in their office jeopardizes a case involving Erin's nephew; Frank grows concerned when he's not invited to speak at a policing forum.
S13, EP5 "Homefront"
Frank launches an investigation after the Reagan family is harassed; Danny and Baez form an unlikely partnership with an informant in order to prevent a murder; Eddie lands in hot water after she defies a direct order.
S13, EP4 "Life During Wartime"
Danny and Baez investigate a series of violent robberies targeting luxury timepieces; Erin is conflicted about criminally charging a potentially innocent man; Frank is forced to reopen a case in which the officer involved was acquitted.
S13, EP3 "Ghosted"
Danny and Baez investigate after a vicious attack leaves their mutual friend, Maggie Gibson, hospitalized; Frank and the team debate the appropriate memorial protocol for a former police commissioner with a questionable professional legacy.
S13, EP2 "First Blush"
Frank announces he will not endorse Erin's run for district attorney; Danny and Baez investigate a bloody crime scene at a hotel; Jamie begins a new job as a field intelligence sergeant that requires him to keep secrets from his family.
S13, EP1 "Keeping the Faith"
Eddie and Jamie deal with a domestic violence case associated with an investigation led by Danny and Baez; Frank and his friend go on a mission to avail themselves to an unfiltered look at the city; Erin is presented with a surprising offer.