“The Good Wife” is the Sasquatch of TV shows: an ultra-rare example of a series hitting a creative peak after years on air — its fifth season (2013-14) was classic television.

And then it struggled to maintain that momentum. Two years on, the show’s lost its bearings and it’s with little excitement that we wait for Season 7’s winter finale, “KSR,” airing Sunday at 9 p.m. on CBS.

Resetting Alicia’s (Julianna Margulies) clock by making her reboot her career as a lawyer was a terrific idea. Equally promising, if not yet explored fully, was pairing her with frisky bond-court attorney Lucca Quinn (Cush Jumbo), she of the ever-fluctuating accent.

Aside from that, the show’s spinning its wheels.

At this point there’s no need to spend any time at Lockhart Agos. The only reason we still get the occasional Christine Baranski-centered episode is that the actress is wonderful and she’s on contract. As for Cary (Matt Czuchry), his constant smirk has gone from boyishly charming to annoying as hell.

Let’s just cut that cord.

The show’s also messing up Eli Gold (Alan Cumming) by making him act inconsistently. By now we’ve lost track of his agenda — what is he trying to do, exactly? Get back at Peter (Chris Noth)? Help Alicia? Destroy fellow political schemer Ruth (Margo Martindale)? And enough with the jokes about his tiny office already!

At least Cumming has slightly more chemistry with Vanessa Williams than he did with America Ferrera in Season 2. That’s not saying a lot.

There is sexual tension between Alicia and her new investigator, Jason Crouse, but that’s because Jeffrey Dean Morgan could have sexual tension with a frozen fish stick. (In fact, he did just that as Katherine Heigl’s love interest on “Grey’s Anatomy.”) But Jason is used mainly as a weapon in the tension among Ruth, Eli and Alicia. By now the show might as well make Alicia join the asexual community. Especially since her libido has taken a back seat to the amount of booze she downs every time she gets home.

We’re still watching “The Good Wife” because the show remains a rarity on network TV, and even cable: elegant, often witty, often smart, supremely well acted (let’s leave Czuchry out of that, though). And yet it’s become less than the sum of its parts. And that’s no good.