. >> this offer starts martin freeman who plays an elementary school teacher caught up in a competition to outdo a rifle school's production. the ghost of tv christmases past. it's a collection of sitcom episodes from years ago including cheers, happy days and way, way back, tv's answer to the polar express, petty coat junction. >> merry christmas, everybody. >> that's the holiday view. nbc news. >> coming up on today in the bay, a possible sign of life on other planets. we will take a look. relive the giants world series run. we will tell you where and how. >>> taking green to a new level. a group of countries talk talking about doing away with the light bulb. marla is coming up on the back side of this break. [ female announcer ] what will you gain when you lose?™ pride. pizzazz. sass! [ laughter ] [ woman ] i'm feeling that! [ female announcer ] the special k challenge™ begins january 1st. free personalized plans at specialk.com. what will you gain when you lose?™ ["stir it up" playing] stir up a smile with hershey's syrup. announcer: in this season of hope, you can do something extr