As Mannion vows to clean up the most crime-ridden block in the city, community tensions rise when Temple is accused of intentionally pushing a police suspect into oncoming traffic.

Mannion creates departmental strife when he orders a special night shift that will put senior officers out on the streets during peak crime hours.

The threat of biological terrorism strikes Washington and Chief Mannion has to arrange almost all his force to search for a potential terrorist. An escapee from juvenile detention murders a taxi driver and a few drug dealers and becomes a big threat once he hides in a public schools, putting in danger hundreds of lives. Temple disguises as a student to catch the killer, in an operation that almost cost Ella the guard of her nephew, if it wasn't for Mannion's interference to the judge.