There was believed to be a programme of euthanasia on Formicia where the elderly were killed so that the young could visit the spa. The Sixth Doctor found it appalling. However, the elderly were actually being made into robots. (AUDIO: The Middle)
In 2010, Vera Juarez's mother had a massive stroke. She made the decision not to keep her alive, which she regretted a year later in the wake of Miracle Day. (TV: Dead of Night)