And that might be another flatline for the fall TV season.

CBS will not be ordering any more episodes of its new medical drama Pure Genius, Deadline reports. The series was met with generally unfavorable reviews (as of press time, it had a 43% rating on Metacritic) and its ratings have been paltry, with its most recent episode notching 5.48 million viewers and a dismal 0.9 rating in the 18-49 demo, far down from its Life in Pieces lead in (6.65 million, 1.4 rating).

Pure Genius got a late start and has only aired four episodes, but it is expected to air all 13 episodes from its initial order and stop production in mid-December after the final episode is completed.

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Of course, as is the case with network decisions today, Pure Genius is not technically canceled and could be in the running to return next fall season. And because CBS still has four midseason dramas to air — Training Day, Criminal Minds: Beyond Borders, Doubt and Ransom — the network may be holding on to a final decision until it sees how everything else does.

But then again, not ordering more episodes of a show is almost always a tell-tale sign that it is canceled. We'd be surprised if the show wasn't preparing a series finale.

Pure Genius airs Thursday nights at 10/9c on CBS.

(Full disclosure: TVGuide.com is owned by CBS.)