Of course, the very reason Person of Interest became so compelling might be one of the reasons CBS only ordered 13 episodes for the show’s final season.
The bigger problem was that Person of Interest didn’t do as well in the 18-49 demographic, averaging only a .97 rating in its final season.
The drama did lose some viewers over time, although we should note that even during Season 5 Person of Interest was earning total viewer numbers that other shows would be quite jealous of.
The Season 5 finale did 6.5 million total viewers—and that was in the middle of June, a time when it is traditionally harder to get audiences to tune in.