The shooting of two black men by a white woman in a crowded subway initially appears to be a case of self-defense, but further investigation reveals revenge as a possible motive.

The shooting of a black honors student stirs up racial tensions, especially after it becomes apparent that the cop responsible for the death may have planted a gun on the body to excuse the shooting.

An assault on a candy storeowner leads Stone and Robinette to build a case against a powerful mafia don.