Ratings: ‘Big Bang Theory’ Top-Rated; ‘Grey’s’ Hits Series Low; Fox Takes Night Overall

“The Office” also slips to a 6-year low

CBS' "The Big Bang Theory" was Thursday's highest-rated show, while "Grey's Anatomy" hit a series low and "Charlie's Angels" plunged 20 percent. "The X Factor" pushed Fox to an overall win for the night, according to preliminary numbers.

While down 10 percent versus last week, "The Big Bang Theory" at 8 p.m. on CBS posted a 4.4/13 in the adults 18-49 demographic, giving it a win for the night, with 13.6 million total viewers. The sophomore episode of "How to Be a Gentleman" followed at 8:30, taking a 2.5/7 in the demo and 7.8 million total viewers. "Person of Interest" at 9 received a 2.5/6 in the demo and 11.4 million total viewers, while "The Mentalist" closed the night at 10 with a 2.7/7 in the demo and 12.8 million total viewers.

Fox aired "The X Factor" at 8, which was the second-highest rated show of the evening with a 3.8/10 in the demo and 11.2 million total viewers. The strong showing gave the network an overall win for the night.

ABC experienced an evening of dips, starting with "Charlie's Angels" at 8, which plunged 20 percent from last week to a 1.2/4 in the demo and 5.9 million total viewers. "Grey's Anatomy" the following hour also brought grim news, dropping 17 percent to a series low with a 3.0/8 in the demo and 8.5 million total viewers. The night closed with "Private Practice" at 10, which fell 21 percent for a 2.2/8 in the demo and 6.2 million total viewers.

NBC also took its lumps Thursday night. "Community" at 8 slid 17 percent to a 1.5/5 in the demo and 3.3 million total viewers, followed by "Parks & Recreation" at 8:30, which was down 10 percent with a 1.9/5 in the demo and 4.1 million total viewers. "The Office" at 9 dropped 11 percent to a 3.1/8 in the demo, making it the lowest-rated episode since April 2005, with 5.7 million total viewers. (It debuted in March 2005.) "Whitney" at 9:30 dipped 8 percent for a 2.3/6 in the demo and 4.8 million total viewers, while "Prime Suspect" at 10 had a 1.5/4 in the demo and 4.9 million total viewers.

At the CW, "The Vampire Diaries" at 8 posted a 1.2/3 in the demo and 2.5 million total viewers, while "The Secret Circle" the following hour" took a 0.8/2 in the demo and 1.9 million total viewers.

Univision's night consisted of "Una Familia Con Suerte" at 8, which drew a 1.8/5 in the demo and 3.6 million total viewers, with "La Fuerza del Destina" the following hour posting a 1.9/5 in the demo and 4 million total viewers and "Mujeres Asesinas 3" closing the night at 10 with a 1.1/3 and 2.3 million total viewers.