Coming intoseason 14, however, the show saw a sharp decrease in ratings. It ranked 20 in season 12, followed by a significant drop to the 29th spot the following year. Initially, it was uncertain if the shortened season 14 was going to be its last, but as the creatives behind the series decided on how to wrap up the year, long-time showrunner Erica Messer appealed for a 10-episode season 15 that would allow them to properly end one of the most successful procedurals on TV.
It's unclear what caused to lose viewership towards the end of its run. However, there are several possible reasons for this. Firstly, the change of slot from Wednesdays 9 pm to a much later time to 10 pm may have contributed to its decline. Secondly, may have also played a part in this. It's worth noting that when Thomas Gibson was fired, it hadn't been long since the show also lost another original cast member, Shemar Moore.
Just two years after ended its run on CBS, however, Paramount+ revived the show, but on the streaming platform.