Owen takes the lead on a murder investigation involving the brother of his former criminal informant who was killed a few years before. Meanwhile, Clark struggles with whether or not to let his recently sober mother back into his and Agnes' life.

Clark and Owen investigate the murder of a wealthy philanthropist who is also the daughter-in-law of a shipping mogul. Meanwhile, Clark’s mother asks for help with a loan shark who is harassing her.

After learning that they are both up for a promotion, Arroyo and Owen try to be the first to make a key arrest.

While trying to track down the person responsible for killing a priest, clues lead them to Natasha, a criminal informant from a previous case, who looks good for the crime. Meanwhile, Agnes sets out to find her mother after she goes missing.

Clark and the unit hunt for the murderer of an aspiring young model found floating in the bay. Meanwhile, Clark becomes a suspect when someone from inside the investigation leaks information about the latest case to Margot Dixon, a reporter Clark has been secretly seeing.

When the family of a star basketball player who was found murdered ignites a high-profile investigation, the case unearths Clark’s feelings about his family struggles. Meanwhile, McKenzie threatens to end her partnership with Arroyo after she finds out he lied to her.