The discovery of a pyre of bodies puts Bill on the hunt for Frank McGill, a hitman notorious for his weapon of choice - a nail-gun. However, having been put into witness protection years earlier after turning in other members of the Maguire gang he worked for, Frank is now off-grid, so Bill sets his sights on tracking him down. Meanwhile, DS Blair is released on bail after information is leaked regarding the unlawful obtaining of key DNA, Commissioner Metcalfe discusses the financial benefits of selling off a disused training facility and the pressure mounts for Bill to resign.
Elenco: Rob Lowe , Rachael Stirling , Aloreia Spencer , Bronwyn James , Anjli Mohindra , Tony Pitts , Anthony Flanagan , Divian Ladwa , Aleksander Jovanovich , Angela Griffin , Vicki Pepperdine , Susan Lynch .