The Ghost Squad

Description
The Ghost Squad was a 2005 British crime drama series produced by Company Pictures, for Channel 4. The show was created by Tom Grieves. Inspired by the real life "Ghost Squad" that existed between 1994 and 1998, secretly investigating police corruption, the premise of the series is that the squad continued to operate in secret after officially being shut down. It starred Elaine Cassidy as a police constable recruited into the squad and Jonas Armstrong as her handler. The show was cancelled after a single seven episode series.
Episodes

One of Us
PC. Amy Harris finds a young Asian man dead in a police interview room, and realises that her fellow officers are framing her for murder.
15 November 2005
Hardcore
Amy, newly recruited to the Ghost Squad, investigates a group of police officers who have been working under cover to expose a sex trafficking network.
22 November 2005
Heroes
Amy is sent under cover to work alongside a police sergeant and expose his corruption.
29 November 2005
The Greater Good
Amy investigates the background of a Chief Superintendent in line for further promotion, but spots her dining with her own boyfriend.
6 December 2005
Firewall
Amy has to discover which of three police officers working on a witness protection programme is corrupt, and make sure that the witness reaches court.
13 December 2005
Necessary Means
Amy has to get close to a CSU officer under investigation by the Financial Crimes Unit, and find out where her money is coming from.
20 December 2005
Colour Blind
Amy goes under cover to investigate a detective inspector accused of involvement in drugs and prostitution.
27 December 2005