Casualty (1986) : 9x3

A horrifying chain of events begins to unravel after Rachel is the victim of a disturbed patient. A case of sexual harassment by her brother-in-law is uncovered when a woman appears anxious about her job. Tragedy strikes a couple who are mugged, when the man dies and then the woman tells Ash, although they lived as man and wife, they were in fact brother and sister. Mike Barratt finally admits to Charlie that his wife has left him and taken the kids. An elderly woman is found dead and her daughter is brought in with stab wounds. A mentally disturbed patient is recognised as the missing daughter, who killed her mother and stabbed her sister. When she tries to kill herself, Charlie comes to the rescue and talks to her. She reveals how her family made her life hell and she just snapped.