The CEO of L.A.’s public TV station, KCET, is stepping down after 18 years. Al Jerome presided over KCET during a tumultuous time for public television stations everywhere, but especially here. A few years ago, he broke with PBS -- just before that network’s huge bit, Downton Abbey, debuted. It’s been downhill for the station ever since. We’ll talk about what’s next for public TV in L.A.