Perhaps the best sitcom on television is NBC's. Saddled right in the middle of NBC's scheduling and ratings woes, the show continues to deliver some of the best emotionally resonant comedy on the small screen. And emotional might be the best way to describe the return of Officer Dave Sanderson to Pawnee. That's right, as reported a few months ago , Louis C.K. is coming back to the NBC sitcom and now we have our first look at his guest spot.NBC released this first look (or should I say first four looks, the other three included below) at Officer Dave's reappearance next week and it couldn't have come at a worse/better time. Worse in terms of Ben and Leslie's budding relationship and better in terms of, well, adding conflict to Ben and Leslie's relationship as well as some assuredly awkward laughs. Oh, and itLouis C.K. so obviously it's highly anticipated.Officer Dave Sanderson is perhaps a more important character forthan first glance might suggest. His arc at the beginning of the second season really helped the show turn the corner from feeling like a retread of theand into its own great series. Unlike a lot of other comedies that achieve their laughs at the expense of any semblance of heart,is hilarious and yet, still manages to be supremely sweet. Obviously, the main factor that makes the show so endearing is Amy Poehler's Leslie Knope and all her various relationships in Pawnee, including and obviously the latest between her and Ben. However, that doesn't mean I'm not looking forward to the 'Louis C.K. wrench' thrown in the works. And by looking forward, I mean I can't wait.airs Thursdays at 8:30 p.m. ET on NBC. It stars Amy Poehler, Nick Offerman, Aziz Ansari, Aubrey Plaza, Chris Pratt, Rashida Jones, Adam Scott and Rob Lowe. "Dave Returns" airs February 16.