This week on The Treatment, Elvis sits down with music journalist Danyel Smith, whose newest book is “Shine Bright: A Very Personal History of Black Women in Pop.” Next, director Simon Curtis talks about his most recent film, currently on Peacock, “Downton Abbey: A New Era,” a continuation of the beloved TV series. And finally, “Late Night with Seth Meyers” host Seth Meyers tells us why a short story by George Saunders keeps his writing honest.