grimm premiere reaction TV Ratings: 'Grimm' finale up nearly a million viewers; CBS wins the night with rerunsFast National ratings for Friday, May 18, 2012.

The “Grimm” finale on NBC was up nearly a million over last week and won its timeslot in the 18-49 demo. The finale of “Nikita” was up slightly over last week’s episode, while the finale of “Supernatural” was right on par with last week’s episode. However, the winning program of the night was a rerun of “Blue Bloods” on CBS, though it was down nearly 4 million over last week.

CBS won the night with an average of 5.4 million viewers and a 3.7 rating/7 share in households. NBC was close behind at 5.2 million viewers and a 3.4/6 share. ABC was third at 4.76 million, 3.1/6 and FOX was fourth at 2.0 million, 1.4/3. The CW trailed at 1.5 million, 1.0/2.

In the 18-49 demographic, ABC and NBC tied at 1.3, followed by a CBS/FOX tie at 0.8 and the CW at 0.5.

Friday hour by hour:

8 p.m.

NBC: “Who Do You Think You Are?” finale (5.54 million, 3.7/7)
ABC: “Shark Tank” finale (5.53 million, 3.6/7)
CBS: “Undercover Boss” rerun (4.3 million, 2.8/6)
FOX: “Kitchen Nightmares” rerun (1.98 million, 1.4/3)
The CW: “Nikita” finale (1.5 million, 1.1/2)

18-49 leader: “Shark Tank” (1.5)

9 p.m.

CBS: “CSI: NY” rerun (5.6 million, 3.8/7)
NBC: “Grimm” finale (5.3 million, 3.3/6)
ABC: “Primetime: What Would You Do?” (4.3 million, 2.8/5)
FOX: “Kitchen Nightmares” rerun (2.1 million, 1.5/3)
The CW: “Supernatural” finale (1.6 million, 1.0/2)
18-49 leader: “Grimm” (1.6)

10 p.m.

CBS: “Blue Bloods” rerun (6.4 million, 4.3/8)
NBC: “Dateline NBC” (4.8 million, 3.3/6)
ABC: “20/20” (4.4 million, 3.0/5)

18-49 leader: “20/20” (1.4)

Ratings information includes live and same-day DVR viewing. All numbers are preliminary and subject to change. Source: The Nielsen Company.

Posted by:Andrea Reiher

TV critic by way of law school, Andrea Reiher enjoys everything from highbrow drama to clever comedy to the best reality TV has to offer. Her TV heroes include CJ Cregg, Spencer Hastings, Diane Lockhart, Juliet O'Hara and Buffy Summers. TV words to live by: "I'm a slayer, ask me how."