Below are the CBS TV show ratings averages as of the end of week 21 of the 2012-13 season (Sunday, February 17, 2013). Ratings are typically the best way to tell if a show will be cancelled or renewed.

Week-to-week gains: The Big Bang Theory, 2 Broke Girls, and Person of Interest.
Week-to-week losses: Two And A Half Men, How I Met Your Mother, Mike & Molly, CSI: Crime Scene Investigation, Elementary, Hawaii Five-0, The Mentalist, The Good Wife, CSI: NY, Blue Bloods, 60 Minutes, and The Job.
New this week: The Amazing Race and Survivor.

Click here to see if there’s a more recent CBS list or, to view past lists.

Want more ratings lists like this? Here are the other networks:
ABC | The CW | FOX | NBC | HBO | Showtime

Want more info on recent/current/future CBS shows? Check our latest CBS network status page to see which shows have been cancelled or renewed, how many episodes there are this season, and when shows will be returning or premiering.

These charts incorporate the daily final CBS show ratings (reported by Nielsen) and are sorted by the 18-49 demographic. Network advertisers typically prize those viewers most and so will pay more to reach them. There’s lots of information that the networks take into consideration when cancelling or renewing a TV series but the ratings are the biggest factor. The higher the ratings, the better chance that the show will be renewed. And yes, they take it into account when a show airs on a Friday or Saturday night.

What do you think? Are you surprised by any of the averages? Which show(s) do you feel should be doing better or worse, based on their quality? Comment below.