Dougie Donnelly presents highlights of the Active Nation Scottish Cup sixth round as six of the remaning eight teams battle it out for a place in the semi-finals. Action comes from Easter Road as Hibernian face Ross County, whilst the day's other ties see Kilmarnock host Celtic and Raith Rovers travel to Dundee. Analysis and comment comes from Pat Nevin and Aberdeen manager Mark McGhee, with commentary by Paul Mitchell in Edinburgh, Liam McLeod in Dundee and Alasdair Lamont in Kilmarnock.