Thursday, October 18, 2012 ratings — New episodes: The Big Bang Theory, Last Resort, 30 Rock, The Vampire Diaries, Two and a Half Men, Up All Night, Grey’s Anatomy, Person of Interest, The Office, Beauty and the Beast, Parks and Recreation, Elementary, Scandal, and Rock Center with Brian Williams. Other programming: Major League Baseball playoffs.

On CBS, The Big Bang Theory won the night with a 4.7 rating in the 18-49 demographic and 15.4 million viewers. Episode-to-episode, the sitcom was up 4% in the demo. Two and a Half Men followed with a season high in the demo with a 4.0 rating (+14%) and 13.6 million.

At 9pm, Person of Interest drew a 2.8 rating (-7%) with 13.8 million. That was followed by Elementary with a 2.3 rating (-8%) and 10.8 million viewers.

On ABC, Last Resort bumped up to a 1.7 rating (+6%) with 7.3 million. Grey’s Anatomy dropped to a 3.3 rating (-13%) with 9.5 million. At 10pm, Scandal held steady with a 2.0 rating and 6.4 million.

On NBC, 30 Rock held onto last week’s demo with a 1.3 rating and 3.3 million while Up All Night rose a whopping 27% to a 1.4 rating with 3.2 million viewers.

At 9pm, The Office dropped further, to a 2.0 rating (-9%) with 4.3 million. Parks and Recreation saw a bigger tumble, registering a 1.6 rating (-16%) with 3.4 million. Rock Center with Brian Williams finished the night with a 0.9 rating (-10%) and 3.5 million.

On The CW, The Vampire Diaries dropped 25% in the demo to a 1.2 rating and 2.7 million. In its second week, Beauty and the Beast dropped like a rock to a 0.7 demo rating (-42%) and 2.0 million viewers. Wow.

And on FOX, the baseball playoffs drew a 1.4 rating with 5.5 million viewers.

Remember, these are the fast affiliate ratings. The individual show’s ratings pages will be updated with the finals when they’re available. Those pages are linked in this post.

What do you think? Are you surprised to see the big declines on The CW? Is this the start of good news for Last Resort? What were you watching last night?