Some Mothers Do 'Ave 'Em his daughter, also named Jessica; references to Frank's mother suggest that she was very like her son. The final series was written by Allen based on stories by Michael Crawford (not written by Crawford himself as sometimes reported) and made five years after the previous one (although there had been two Christmas specials in between). Frank's character changes noticeably in this series, becoming more self-aware and keen to make himself appear more educated and well-spoken. He develops an air of pomposity which is always best demonstrated when someone would approach and enquire "Mr Spencer?" to which he would always reply,
Some Mothers Do 'Ave 'Em would be seen to gradually suffer the inevitably chaotic consequences of Frank's fleeting presence in their lives. These characters were often played by some of the greatest and recognisable character actors of the era, including George Baker, James Cossins, Peter Jeffrey, Richard Wilson, Fulton Mackay, Bernard Hepton, Christopher Timothy, George Sewell, Bryan Pringle, Christopher Biggins, Milton Johns, Diane Holland, John Ringham, David Ryall, Gretchen Franklin, Geoffrey Chater, Royston Tickner, Michael Redfern, Babar Bhatti, Norman Chappell, Geoffrey Whitehead and Elisabeth Sladen (who, in her autobiography, mentions that she was considered for the role of Betty). The theme tune by Ronnie Hazlehurst