Go behind the scenes with David Tennant, Daniel Mays and Jason Watkins on the making of Des, a threepart drama miniseries, based on the 1983 arrest of Scottish serial killer Dennis Nilsen. Like, follow and subscribe to ITV s official YouTube channel here: Make sure you re following ITV for all the latest. Watch more of the shows you love on the ITV Hub , Des, DavidTennant, Dani