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    Thursday Night Television

    Critic’s Corner: What’s on TV tonight

    Ali Goldstein/NBC

    30 Rock 8 p.m., Channel 7

    I’ve written plenty about my love for “30 Rock,” which has an hourlong finale tonight. Over the years, the show has had a few ups and downs, but I stand by my opinion that overall, it has remained sharp. A bunch of special guests are scheduled for the Emmy-winning sitcom’s last hurrah, including Nancy Pelosi, Ice-T, Julianne Moore (above with Alec Baldwin), and Salma Hayek.

    The Colbert Report 11:30 p.m., Comedy Central


    Beethoven’s Fifth will not be denied. Matthew Guerrieri, one of the Globe’s regular classical music writers, has a book out called “The First Four Notes: Beethoven’s Fifth and the Human Imagination.” About Beethoven’s creation of the piece and how it has been interpreted around the world, the book was on a lot of Top 10 lists last year. Thursday night, Guerrieri (above) gets the Colbert treatment.

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    Mary Mary 9 p.m., WE

    That’s the only rule that is contrary.

    Legit 10:30 p.m., FX

    Billy goes fishing for a cat.


    The Tonight Show With Jay Leno 11:35 p.m., Channel 7

    Quvenzhané Wallis, bringing misery to spell checks everywhere.

    Matthew Gilbert can be reached at Follow him on Twitter @MatthewGilbert.