Southland

Officer John Cooper returns to duty after recovering from surgery; Lydia helps a former informant; Ben, Sammy and Dewey chase an armed man into a school; Ben argues with an intense street cop.

Tang and Cooper are attacked on the street; Lydia and Ruben investigate a convenience store murder; Ben and Sammy ride with another officer; Joel Rucker takes over as the new captain.

A violent gang war erupts when Sammy leaves a gang territory unattended on Hood Day; Ben is haunted by his recent mistake; Ruben practices his speech; Cooper and Tang investigate a robbery.

Tang tries to help a homeless vet; Sammy is determined to save a dog that he accidentally shot; Lydia and Ruben investigate the murder of a man who helped women in need; Ben and Lydia face life changes.

John tries to save a suicidal teenager; Sammy convinces a former addict to be an informant; Tang gets a visit from someone from her past; Lydia and Ruben investigate a home invasion.

A man who agreed to testify in one of Sammy's cases is murdered; John and Tang babysit a documentary film crew; Lydia must serve as shift supervisor for the day.

Tang is served legal papers and is later involved in a shooting; Sammy holds a grudge against Ben; Lydia makes a decision about her pregnancy.

Lydia and Ruben must investigate the death of a nanny as well as locate the children she tended; Ben tries to intervene with a prostitute; Tang gets an update about the boy.

Ben tries to help a prostitute's daughter; Lydia and Ruben investigate the murder of a gang member; Tang faces questions about the shooting of an innocent bystander.

Tang prepares to move to another precinct; Lydia is pressured to make a decision about her police duties during her pregnancy; Ben tries to track down a prostitute.