Derek Martinus, an early director of the long-running sci-fi series Doctor Who, passed away last week as a result of Alzheimer's. He was the first director of the series to direct in color.
While a number of Doctor Who stories have touched on the theme of forgetting, such as anything dealing with Silence or the end of Doctor Donna, I thought that the series had not touched on dementia or Alzheimer's. In fact, it has. In 2002, Relative Dementias by Mark Michalowski was published. In it, the Doctor is asked if Time Lords get Alzheimer's. Alzheimer's has also been touched on several other times by the series.
I always find it interesting when series touch on difficult issues because it allows the topic to be discussed publicly and collectively.