SERIES PREMIERE: I’m not recommending this, necessarily, but it’s certainly worth noting, as television’s first reality-series musical of sorts. It takes place in Branson, MO, the place where show-biz performers past their prime come to perform for aging, enthusiastic audiences. And it concerns the Baldknobbers Jamboree, the unfortunately named family revue that has operated in Branson for 55 years. That’s an astounding feat of show-business longevity, but understandably, the Mabe family business is a little frayed around the edges, and looking to survive by injecting some “new blood.” This sets up some unpredictable auditions, and even an All About Eve subplot, with one veteran singer, Megan McCombs, feeling threatened by the younger, obviously ambitious Heather Gentry. And sometimes, when these folks air their grievances to the camera, they do so in song – which is weird, but, you have to admit, different.