The 20 Must-See Shows of the 2012 Winter TV SeasonOur picks include '30 Rock,' 'American Idol,' 'Smash,' 'Mad Men' and more
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'Downton Abbey' (PBS, 1/8)
When the second season of this British period drama debuts on PBS on January 8th, the show's cast will be dealing with life in the wake of World War I. Though everyone and everything will be changed by the Great War, the new episodes will still feature plenty of the scheming and backstabbing that has made the show a surprise hit.