Ghost Squad

The routine arrest of a young man turns into a murder case.

Amy investigates a team of undercover cops who've been tracking a network of sex traffickers.

Amy is sent undercover to work alongside a police sergeant and expose his corruption.

Sally Marshall is the head of a serious-crime squad, but her clear-up rate is suspiciously high.

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.

Financial irregularities prompt investigation.

Amy goes under cover to investigate a detective inspector accused of involvement in drugs and prostitution. A double length series finale (Part 1).

Amy meets with McKay and Pete to go over the evidence.