Kevin Mukherji

As Lucille begins an affair with George Sr.'s twin brother, Oscar, the Mexican police arrest George Sr. after they mistake him for Oscar, who's wanted on marijuana charges.

The day's events bring all of our cops face to face with some of their greatest fears. The death of a baby shakes Lydia to her core. Sammy is questioned by I.A. about his altercation with Tammi. A difficult day on the job causes Cooper to seek solace in Hicks (guest star GERALD McRANEY) but finds none. Ben becomes more deeply involved with Brooke while continuing to see Elena (guest star CARMEN CORRAL).

Jack and the team search for a teenager, William Hope (Dempsey Pappion), who goes missing in a very bad neighborhood after a confrontation with a local bully. Considered a good kid, William was living in a foster home after 18 months on the street and seemed destined for a better life when he disappeared. The squad discovers that his older brother, Aaron (N. Neko Parham), who was recently released from juvenile hall, visited William, despite the fact that his foster family forbade Aaron from being in their home. Jack and the others then learn that William was seen getting into a car with Aaron immediately prior to disappearing, and they fear that the good kid may have gone bad.