May sweep starts with a whimper Thurs.

Several series hit lows

The May sweep is here, but where are the viewers?

The sweep period kicked off Thursday in an unusual fashion with a numbers of series, including juggernauts "Grey's Anatomy," "CSI: Crime Scene Investigation" and veteran "ER" hitting lows.

ABC still won the night among adults 18-49 on the time slot-winning performances of "Grey's" and "October Road," while CBS was tops in total viewers.

CBS opened the night with a dominating win for "Survivor: Fiji" (13.8 million viewers, 4.5/13 share among adults 18-49), according to early Nielsen estimates. NBC's comedies "My Name Is Earl" (7.6 million, 3.2/10) and "The Office" (7.5 million, 3.9/11) , while Fox's "Are You Smarter Than a 5th Grader?" (10 million, 3.4/10) continues to stay competitive in the hour. Meanwhile, "Ugly Betty" (9.6 million, 3.1/9) had another soft outing, finishing fourth in the hour in 18-49.

At 9 p.m., "Grey's" (19.75 million, 8.2/21) had its lowest 18-49 delivery of the season with original episodes but still dominated the hour in the demo. In total viewers, it was edged by "CSI" (19.99 million, 5.8/15), which hit an all-time demo low for a Thursday original.

The controversy surrounding star Alec Baldwin didn't help the season finale of "30 Rock," which logged 4.8 million, 2.4/6 at 9 p.m., matching the freshman series' lowest 18-49 numbers. It was followed by "Scrubs" (4.7 million, 2.3/6), which posted a season low in 18-49.

ABC's midseason entry "Road" (9.3 million, 4.2/12) did OK in its season finale, winning the 10-11 p.m. hour in adults 18-49 but showing 15% erosion between the first and the second half-hour. CBS' "Shark" (14.3 million, 3.9/11) was on par, while "ER" (9.4 million, 3.7/10) tied its lowest 18-49 rating ever for an original episode.

For the night, ABC averaged 12.9 million viewers and a 5.2/14 in 18-49 to CBS' 16.0 million, 4.8/13.

NBC (7.2 million, 3.2/9) was third in the demo, while Fox (7.6 million, 2.8/8) was third in viewers.

CW (3.6 million, 1.4/4) did well with "Smallville" and "Supernatural."