big bang theory 1013 rating TV ratings: 'Big Bang Theory' leads Thursday, 'X Factor' down a little, 'Vampire Diaries' upFast national ratings for Thursday, Oct. 13, 2011

A pretty ho-hum Thursday on the broadcast networks played out mostly according to form — CBS led the way in viewers, and FOX topped the adults 18-49 demographic. “Charlie’s Angels” and “Prime Suspect” continued to struggle (although the former was up slightly), and “The X Factor” came in a little below average. “The Vampire Diaries” posted gains over last week, however.

CBS scored 12.2 million viewers and a 7.6 rating/12 share in households for the night, beating out FOX (10.8 million, 6.4/10) for the top spot. ABC (7.45 million, 5.0/8) finished third. NBC averaged 4.5 million viewers and a 2.9/5 to take fourth, and The CW trailed with 2.3 million viewers and a 1.5/2.

FOX’s 3.6 rating among adults 18-49 was the night’s top mark, half a point better than CBS’ 3.1. ABC came in third with a 2.4, followed by NBC, 1.9, and The CW, 1.1.

]]>8 p.m. CBS: “The Big Bang Theory” (13.3 million viewers, 8.2/14 households)/”The Big Bang Theory” rerun (12 million, 7.3/12)
FOX: “The X Factor” (10.5 million, 6.3/10)
ABC: “Charlie’s Angels” (6 million, 3.9/6)
NBC: “Community” (3.8 million, 2.4/4)/”Parks and Recreation” (4 million, 2.4/4)
The CW: “The Vampire Diaries” (2.8 million, 1.7/3) 18-49 leader: “The Big Bang Theory” (4.4) 9 p.m. CBS: “Person of Interest” (11.9 million, 7.4/11)
FOX: “The X Factor” (11.1 million, 6.5/10)
ABC: “Grey’s Anatomy” (9.7 million, 6.5/10)
NBC: “The Office” (6.05 million, 3.6/6)/”Whitney” (4.2 million, 2.7/4)
The CW: “The Secret Circle” (1.8 million, 1.2/2) 18-49 leader: “The X Factor” (3.8) 10 p.m. CBS: “The Mentalist” (12.25 million, 7.7/13)
ABC: “Private Practice” (6.7 million, 4.7/8)
NBC: “Prime Suspect” (4.5 million, 3.1/5) 18-49 leader: “The Mentalist” (2.5)

Ratings information includes live and same-day DVR viewing. All numbers are preliminary and subject to change. Source: The Nielsen Company. More ratings at Zap2it: Daily, weekly and cable