Ever since the full-blown 50th anniversary weekend of NBC’s “Saturday Night Live” a couple of weeks ago, I have been diving deep into the program’s history. Other than watching the behind-the-scenes documentary specials and the excellent film about the show’s musical guests through the years, I’ve been reading a couple of books about the series and listening to a variety of podcasts having to do with all things SNL. And, finally, I watched the recent movie about the making of the first episode called “Saturday Night”.