All five series of the gritty British police drama starring Ken Stott as DI Chappel, the head of a Metropolitan police vice squad uncovering the worst excesses of the prostitution and pornography trades in the city. In series one, the team try to track down a prostitute's murderer before he strikes again, and PC Hutchins (Caroline Catz) goes undercover to track down a young boy used in a violent porno film. Episodes are: 'Daughters (Parts 1 and 2)'; 'Sons (Parts 1 and 2)'; and 'Dabbling (Parts 1 and 2)'. In series two, a children's home is discovered to be pimping vulnerable young children, and a massage parlour is involved in trafficking women from Eastern Europe into the country. Episodes are: 'Home is the Place (Parts 1 and 2)'; 'Walking on Water (Parts 1 and 2)'; 'Betrayed (Parts 1 and 2)'; and 'Lovesick (Parts 1 and 2)'. In series three, Chappel runs into his former boss in a Soho brothel, and Chappel has to do his best to stop an ex-girlfriend from returning to the vice trade. Episodes are: 'Out of Mine'; 'Into the Night'; 'Force of Nature'; and 'Falling'. In series four, PC Morgan (Rosie Marcel) goes undercover as a prostitute but takes it too far, while Chappel goes undercover to unearth a paedophile ring. Finally, in series five, Chappel has been transferred to a desk job, but when Hutchins goes missing, he risks everything to track her down. Episodes are: 'Hooked'; 'Control'; 'Gameboys'; 'Untouchable'; 'Outcast'; 'Birdhouse'; and 'Lust'.