Hector refuses treatment for Parkinson's disease.
The girlfriend and the mother of an attempted suicide decide his fate.
Katherine battles to prevent the suicide of a patient; an affair threatens careers and marriages; Alison endures a mid-life crisis.
Katherine's views on euthanasia come out during Elaine's murder trial.
Katherine faces the most difficult ethical decision of her life.
Child faces a risky bone-marrow transplant.