`Mum' is a critically well-received family sitcom by the hands of BAFTA Award-winning writer Stefan Golaszewski. The story follows lead character suburban mum Cathy, portrayed by Olivier Award-winning Lesley Manville, as she mourns her husband's death and tries to move on in the years that follow, starting with the funeral in January and ending on New Year's Eve. Each episode in the earlier series revolves around a month in which Cathy attempts to rebuild her life, surrounded by her sometimes problematic family and friends.