Ratings: Person of Interest Draws Big Numbers

The compelling fall finale of CBS’ Person of Interest, facing all repeats and an ABC year-end special, drew 12.8 million total viewers this Thursday to net the freshman drama its largest audience since its premiere, while holding steady with a 2.8 demo rating.

A highly entertaining episode of The Mentalist led out of that with the night’s biggest audience, 13 million total viewers, and a 2.7 rating (flat versus a week ago).

Hot for Winter: Your January Premieres Calendar

Elsewhere on Thursday:
* The X Factor results show (9.65 mil/2.9) was flat week-to-week.

* Leading out of a Big Bang repeat, Rules of Engagement (9.7 mil/2.7) dipped 10 percent in the demo.

* ABC’s Katie Couric special mustered just 5.5 million total viewers and a 1.5 rating.

* NBC’s Prime Suspect, with 3.6 million viewers and a CW-like 0.8 rating, dropped sharply from its last fresh episode and delivered just half of the demo rating Grimm got here a week ago.