With its red-robed handmaids, zombie ice dragons and supernaturally gifted tweens, 2017 was by any estimate a memorable year for television. But 2018 holds plenty of promise for TV fans. Here’s a look at the year ahead on the small screen. • TREND: In the past few years, numerous big-name feature directors have tested the limits of their endurance — and bucked industry norms — by helming seasons of TV.