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  • "The Good Wife" (9 p.m. Sunday, CBS) : It may not garner the buzz and ratings of other top-flight dramas, but in its fifth season, this legal thriller continues to be one of prime time's best. Now comes a game-changing episode called "Hitting the Fan," in which Alicia's (Julianna Margulies) secret plot to start a new firm with Cary (Matt Czuchry) is finally exposed. That triggers an intense, gripping hour as emotions boil over, battle lines are drawn and a desperate struggle to retain clients begins.

  • "Secrets of the Tower of London" (8 p.m., PBS): Vieweres get a fascinating tour of a historical landmark that has stood for nearly a thousand years and served as a royal castle, a prison, a place of execution and torture, an armory and the Royal Mint.

    "A Precious Commodity"--Will (Josh Charles, right) needs Alicia’s (Julianna Margulies, left) help when an internal conflict at the firm
    "A Precious Commodity"--Will (Josh Charles, right) needs Alicia's (Julianna Margulies, left) help when an internal conflict at the firm necessitates a vote by the partners, on THE GOOD WIFE, Sunday, Oct 13 (9:00-10:00 PM, ET/PT) on the CBS Television Network. Photo: Myles Aronowitz/CBS �©2013 CBS Broadcasting Inc. (Myles Aronowitz)

  • "Halloween Wars" (9 p.m., Food Network): The deliciously scary series comes to an end tonight with the final challenge: Create a confection that conjures up visions of "terror and nightmares." The winners nab $50,000.

    Also Sunday:

  • "Once Upon a Time" (8 p.m., ABC)

  • "The Amazing Race" (8 p.m., CBS)

  • "Homeland" (9 p.m., Showtime)

  • "Revenge" (9 p.m., ABC)

  • "The Walking Dead" (9 p.m., AMC)

  • "Masters of Sex" (10 p.m., Showtime)

  • "The Mentalist" (10 p.m., CBS)

  • "Witches of East End" (10 p.m., Lifetime)

  • "The Governor's Wife" (10 p.m., A&E -- Series premiere)