Dealing with the aftermath of gang warfare, Doc and Carlos disagree over reaching out to prevent an eleven year old boy from following his brother into a gang; Bosco’s decision…

Unable to communicate with the outside world, the Unit and their families must survive when a deadly gas poisons anyone in their community who steps outside.

Investigating the murder of a cab driver, the detectives come to suspect a famous author and his protege, a former child prodigy.