John Hargensen is the father of Chris Hargensen. He is a lawyer. He tries to give her daughter the possibility to go to the prom after her prom ticket was refused. Principal Morton, however refused and showed him evidence, which showed his actions regarding her were justified and putting this to court would only worsen things even more. He had no choice, but to relent.
- The 1976 adaptation is the only one where John Hargensen does not appears.