Having given us earlier this year its take on the murders carried out in 1985 by Jeremy Bamber in 'White House Farm' , ITV is back again with a drama that wades through horrific, real life crime. 'Des,' written by Luke Neal and Kelly Jones, focuses on the confession of one of Britain's most infamous serial killers, Dennis Nilsen in 1983. Not so much a whodunnit but more of a how many did he kill, it features David Tennant as the Aberdeenshire born murderer and pits him against Daniel Mays' Detective Chief Inspector Peter Jay. At the start of director Lewis Arnold's gripping three part miniseries, Jay is going through a painful marriage breakdown. It is a rare glimpse of Jay's life outside the police as soon he and Barry Ward's Detective Inspector Steve McCusker are responding to reports of the discovery of human remains in a drain by Tony Watt's Dyno Rod employee Michael Crattan. Jay and McCusker wait for Nilson to return home from work and on