Episode #2.8 - S2-E8
Plot hole: In this episode Cathy's father comes looking for her, he walked out on his family eleven years ago and had no contact with them during that time. Cathy's mother always told her that her father had died when she was a baby so A) How did Mr Hargreaves know which school Cathy attended? and B) how did he recognize her straight away when he hadn't seen her since she was a year old baby and she was now twelve years old?