"'What was it like to grow up on TV?' Ron Howard has been asked this question throughout his adult life. In The Boys, he and his younger brother, Clint, examine their childhoods in detail for the first time. For Ron, playing Opie on The Andy Griffith Show and Richie Cunningham on Happy Days offered fame, joy, and opportunity—but also invited stress and bullying. For Clint, a fast start on such programs as Gentle Ben and Star Trek petered out in...