The parents of psychopathic teenager Wendy Sherlock have difficulty proving their innocence when it appears to the police that they are mistreating her. When a young man is badly slashed with a razor blade, the girl's parents suspect her - but she appears so innocent on the surface and displays such a plausible mien that even doctors and the police are fooled. Notes: This episode won a Logie award for best individual episode in a series (1975).