This poignant, informative study of Alzheimer's blends the personal stories of patients and their families with segments on research into finding a cure for---or at least delaying the insidious progression of---a mysterious disease in which, Dr. John Growdon says, "the essence of the person slowly ebbs away." Narrator: Linda Hunt. Actor David Hyde Pierce hosts a follow-up discussion on the topic.
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TVGuide.com editors break down theories about what's coming up on The Walking Dead