Rangers vs Celtic preview; Glass' in-tray at Aberdeen; Do Hearts need to rebuild?

Kris Boyd, Andy Walker & Ian Crocker look ahead to the Scottish Cup fourth round ties including Sunday's Old Firm at Ibrox and analyse what is on Stephen Glass' in-tray at Aberdeen as he prepares for his first match in charge of the Dons against Livingston. Plus, after Hearts sealed promotion back to the Premiership, Walker & Boyd discuss what next for the Tynecastle side and the pressure facing Robbie Neilson.