Oliver Sacks (1933–2015) was a neurologist and writer who turned clinical case histories into portraits of individual lives. His 1973 book Awakenings described patients who had survived the encephalitis lethargica epidemic and later received L-Dopa, establishing the humane narrative method that shaped his wider work. Sacks had a retinal melanoma that cost him vision in one eye; when cancer later spread, he announced in 2015 that his remaining time was limited. This obituary comic traces his habits of close attention, his refusal to reduce patients to diagnoses, the reach of Awakenings and later books, and his response to terminal illness. His final essays, collected as Gratitude, considered friendship, work, beauty, mortality, and the value of a singular life. The account draws on the official Oliver Sacks biography and Gratitude pages, plus obituaries from The Guardian and The New York Times.