Here we go again. Tonight, CBS airs the ninth season finale of CSI: NY. Will the long-running show be cancelled so that it ends up also being the series finale as well?

As with any show, the network has to look at the costs to produce CSI: NY versus the revenue it generates. CSI: NY has been on the air for nearly 200 episodes and so the costs have risen over the years. Unfortunately, the ratings haven’t gone up as well.

In season seven, CSI: NY averaged a 1.8 rating in the 18-49 demographic with 10.03 million total viewers. Last season, the show averaged a 1.6 demo rating with 9.94 million. This year, it’s averaged a 1.4 rating with 9.68 million viewers.

Is it worthwhile for the network to keep producing more episodes or should they try something new? They haven’t had any luck launching new dramas on Friday nights — Made in Jersey and A Gifted Man, for example — so trying to replace CSI: NY might be a tricky proposition.

As Gary Sinise recently told Larry King regarding the ninth season renewal, “It was a 50-50 toss-up. We have a good solid show but I know from a business perspective what they’re thinking about, looking at. Has our show run its course? Can they find a new show that’s cheaper to make than ours that can do as well? They have to take a lot into account but we’re a solid show.”

If CSI: NY does return it will be without one castmember. Hill Harper, who’s played Sheldon Hawkes since the show began, is leaving. He’s becoming a series regular on USA’s Covert Affairs drama starting with season four.

What do you think? Has CSI: NY run its course? Should CBS cancel it and replace it with an existing drama or something new? Would you like to see it come back for a 10th year?