Mum was a British sitcom written by Stefan Golaszewski that centered on the recently widowed, suburban 59-year-old Cathy (played by Lesley Manville) and her family, following her husband's death, airing on BBC Two from 2017-2019. Each episode is named after a calendar month in the year, except series three which is set over just one week. The series features Cathy's supportive lifelong friend Michael (played by Peter Mullan), and her family: son Jason and his girlfriend Kelly, Cathy's brother Derek and his new partner Pauline, and Cathy's in-laws.