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'The Last Days of Ptolemy Grey' stars Samuel L. Jackson as Ptolemy Grey, an ailing man forgotten by his family, by his friends, and by even himself. Suddenly left without his trusted caretaker and on the brink of sinking even deeper into a lonely dementia, Ptolemy is assigned to the care of orphaned teenager Robyn. When they learn about a treatment that can restore Ptolemy's dementia-addled memories, it begins a journey toward shocking truths about the past, present and future.