“Good Morning, Peoria” Originally aired 11/8/1989 In which Sam saves rock ’n’ roll… In case it hasn’t become obvious by this point, I’ve been reviewing Quantum Leap on a bit of a curve. The show has clear strengths: a great central premise, a sense of optimism about the human experience, and two well-cast leads with terrific chemistry. It’s also a production of its time, and while I’m sure there was more sophisticated television happening in the…