SEASON PREMIERE: It’s Season 43 for Saturday Night Live as a TV show – which means it’s also Season 43 for me as a TV critic, since this was the first series I ever reviewed as a columnist for a daily newspaper. Tonight’s guest host: Ryan Gosling. Tonight’s musical guest: Jay-Z. That’s a far cry, and 42 years, from opening night, when the guest host was George Carlin, and the musical guests were Billy Preston and Janis Ian. (Hi, buddy Janis, if you’re reading this!)