Last week’s episode, on “The Seventies,” really knocked me out, with even more detail and insight than I expected about such 1970s turning points as The Godfather, The Last Picture Show, Jaws, American Graffiti, Star Wars, Close Encounter of the Third Kind, The French Connection, Cabaret, All the President’s Men, McCabe and Mrs. Miller, MASH, Nashville, Harold and Maude, Five Easy Pieces, One Flew Over the Cuckoo’s Nest, and Dog Day Afternoon.&nb