In Deep

Liam and Garth pose as drug dealers in a bid to capture Jamie Lamb, the country's biggest cocaine importer. They infiltrate his trusted entourage and fit in so well that, when Lamb’s wife leaves him and takes his two daughters with her, he asks Liam and Garth to kill her and bring back proof in exchange for a shipment of cocaine.

Kelly persuades Tania Lamb to help them fake her murder. However, when the "proof" is taken back to Jamie, he turns nasty and ups the stakes, declaring that the deal is not complete until his daughters have been returned to him. Liam and Garth are forced to use Lamb's daughters as insurance to make sure the exchange of drugs takes place. But Tania’s fit of guilt leaves Garth and Liam vulnerable.

When DCI Mark Holland is executed in a drive-by shooting, his colleagues suspect local crime kingpin Charlie Pearce of being behind the murder. In order to investigate, Liam, Garth, and Kelly are sent undercover posing as importers of fake watches-and a possible target for Pearce's protection racket.

Garth is in critical condition after being shot by David Pearce. Liam is determined to get revenge, but he must balance his emotions as he tries to find out who was behind the murder of DCI Holland and the attempt on Charlie Pearce's life.

When Fiona Waddington's teenage daughter and young son are kidnapped, a ransom is sent to her family's publishing company. As the kidnappers don't want the police involved, Liam and Garth have to pose as kidnap-and-ransom specialists.

After the botched exchange, Garth is being held by the kidnappers, and Liam is off the case due to concerns over his personal life. The kidnappers send new demands, but Clayton Waddington is unwilling to meet them.

A killer is targeting the members of a dating site. The team work to draw out potential suspects under the guidance of a criminal profiler. Meanwhile, Liam's involvement with an obsessive estate agent causes his relationship with his ex-wife and children to become even more fraught.

Another murder has been committed. Garth is sent undercover to befriend key suspect Grendel. The team become concerned when Dr. Winterbourne works out a pattern to the killings, which suggests that Liam's ex-wife, Pamela, is a potential victim.