Season 4, Episode 1
James and Alesha risk their careers for a case involving a murdered pregnant doctor which may be part of a government conspiracy.
Season 4, Episode 6
A police officer's teenage son is murdered, and a note on the victim's body references a convict who's serving time for a racially motivated killing.
Season 4, Episode 5
An ex-pro footballer is slain, and a gambler with mob affiliations may know who killed him.
Season 4, Episode 3
A baby's death results in a probe that implicates a nanny and her boyfriend.
A disabled teenager dies in a suspicious fire, and investigators turn up an absentee father, who is behind on support payments.
Season 4, Episode 2
A high-court judge is shot during what appears to be a carjacking, but the investigation implicates someone close to the victim.