Jimmy Grainger (portrayed by David Crellin) was the father of two girls who attended Waterloo Road School. He had split from their mother and was seeing another woman.
Jimmy spends one Saturday night watching the television with his daughters, Mika and Chlo Grainger. Chlo persuades him to leave early and go and see his girlfriend.
After being banned from looking after his daughters, Jimmy turns up at the school one morning to confront Izzie. Despite the girls’ protests, she refuses to allow him privelages. He turns up at the end of the day after gluing the locks to Izzie’s car doors. Tom Clarkson hits him in the face for insulting her. He reports him for assault and threatens Izzie.