In this week's episode of Glee (8 p.m., Fox/Ch. 13), grads spend Thanksgiving trying to get the glee club ready for sectionals.Eight episodes into Season 4, one thing has become absolutely clear. Producer Ryan Murphy & Co. should have either made this a show about what's happening in New York or restocked the cast and continued as a high school-centric show. This bifurcation isn't genius, it's a failed attempt to have your cake and eat it too.Of course, it might have helped if the new characters weren't just clones of the old characters. Sigh.Elsewhere on TV ...NFL (6 p.m., NFL Network): New Orleans Saints at Atlanta FalconsThe Big Bang Theory (7 p.m., CBS/Ch. 2): Sheldon and Wolowitz fight over a parking spot.Last Resort (7 p.m., ABC/Ch. 4): The islanders and the crew celebrate Thanksgiving together. Weird.30 Rock (7 p.m., NBC/Ch. 5): Liz and Criss step up their efforts to start a family.The X Factor (7 p.m., Fox/Ch. 13): Contestants are eliminated.The Vampire Diaries (7 p.m., CW/Ch. 30): Jeremy is having terrifying nightmares.Rocket City Rednecks (7 and 9 p.m., NGC): The guys enter a NASA contest and try to build a rocket.Two and a Half Men (7:30 p.m., CBS/Ch. 2): Alan starts dating an actress.Up All Night (7:30 p.m., NBC/Ch. 5): Reagan is surprised to learn Ava has new friends.Person of Interest (8 p.m., CBS/Ch. 2): The numbers of both a man and his wife come up.Grey's Anatomy (8 p.m., ABC/Ch. 4): Pretty much everybody is caught up in romantic problems.The Office (8 p.m., NBC/Ch. 5); Angela finds out her husband is having an affair.Beauty and the Beast (8 p.m., CW/Ch. 30): J.T. Thinks Vincent might have killed a college student.Parks and Recreation (8:30 p.m., NBC/Ch. 5): Leslie asks the public for park-design suggestions.Elementary (9 p.m., CBS/Ch. 2): Sherlock investigates an explosion that killed two people.Scandal (9 p.m., ABC/Ch. 4): Olivia and the White House staff prepare to celebrate the president's 50th birthday.It's Always Sunny in Philadelphia (11 p.m., FX): The gang gets caught up in a case of mistaken identity.