Duke, “who won an Oscar at age 16 for her portrayal of Helen Keller in The Miracle Worker but was more known for her bouncy 1960s TV sitcom The Patty Duke Show, … came to fame as a teenager, combining both a masterful talent for dramatic acting with a sunny, all-American image that enchanted both TV and film audiences. But her admirers had no clue about the much-uglier reality of Duke’s childhood.”