Great movie #1: This is “dead week” for TV, when even the premium cable networks, such as HBO and Showtime, basically kick back and take it easy. So with virtually no new Sunday night TV series shown tonight, in the quiet period between Christmas and New Year’s Day, the TV offerings to gravitate towards are movies. And here’s an excellent one: 1965’s Dr. Zhivago, directed by David Lean, and starring Omar Sharif and, at her most luminous, Julie Christie.