An unofficial top secret Internal Affairs unit that recruits former police officers who've proved their honesty during their service and sends them undercover to investigate and root out corruption within the police.
One of UsPC. Amy Harris finds a young Asian man dead in a police interview room, and realises that her fellow officers are framing her for murder.
Hardcore
F2
HardcoreAmy, newly recruited to the Ghost Squad, investigates a group of police officers who have been working under cover to expose a sex trafficking network.
Heroes
F3
HeroesAmy is sent under cover to work alongside a police sergeant and expose his corruption.
The Greater Good
F4
The Greater GoodAmy investigates the background of a Chief Superintendent in line for further promotion, but spots her dining with her own boyfriend.
Firewall
F5
FirewallAmy has to discover which of three police officers working on a witness protection programme is corrupt, and make sure that the witness reaches court.
Necessary Means
F6
Necessary MeansAmy has to get close to a CSU officer under investigation by the Financial Crimes Unit, and find out where her money is coming from.
Colour Blind
F7
Colour BlindAmy goes under cover to investigate a detective inspector accused of involvement in drugs and prostitution.
