Last week's episode of Glee (7 p.m., Fox/Ch. 13) made me really, really sad.Not that it was a bad episode. It was actually better than a lot of what we've seen the last few, well, years. And the big farewell for Mr. Schuester (Matthew Morrison) - complete with a flash-back-to-the-beginning rendition of "Don't Stop Believin'" - was actually quite good.Which is why it made me sad. Because it reminded me that "Glee" used to be good. And that's getting harder and harder to remember.The show is finally doing what might have helped had it happened a couple of seasons ago. Pretty much everybody (other than Mr. Schuester) is moving to New York, and the show will be focused pretty much exclusively there.(And there's some chatter that we haven't seen the last of Morrison.)It's kind of too late, however. This is a show that has forgotten what made it good - the enthusiasm, the fun - and is so far gone it's difficult to imagine that it can recover creatively.Elsewhere on TV ...NCIS (7 p.m., CBS/Ch. 2): Evidence suggest the Privileged Killer has a copycat.Marvel's Agents of S.H.I.E.L.D. (7 p.m., ABC/Ch. 4): The search for the Clairvoyent sets the team up against Deathlok.The Voice (7 p.m., NBC/Ch. 5): The battle rounds continue.The Story of the Jews with Simon Schama (7, 8 and 9 p.m., PBS/Ch. 7): Three more episodes conclude this five-part series.NCIS: Los Angeles (8 p.m., CBS/Ch. 2): Hetty sends a team to Afghanistan to rescue Kensi.The Goldbergs (8 p.m., ABC/Ch. 4): Beverly tries to get Adam out of the Presidential fitness test.About a Boy (8 p.m., NBC/Ch. 5): Will is smitten with a doctor.The Mindy Project (8 and 8:30 p.m., Fox/Ch. 13): Mindy deals with the aftemath of her kiss with Danny; Mindy discovers an online video of herself she wants to get off the Internet.Cougar Town (8 p.m., TBS): Jules fakes being healthy. (Season finale)Trophy Wife (8:30 p.m., ABC/Ch. 4): Pete lies to DianeGrowing Up Fisher (8:30 pm., NBC/Ch. 5): Mel freaks out when he finds marijuana in Katie's bag.Person of Interest (9 p.m., CBS/Ch. 2): Shaw and Reese go under cover at a high school reunion.Twisted (10 p.m., ABC Family): There are conflicting confessions. (Season finale)Justified (11 p.m., FX): Raylan puts pressure on every criminal in town.