ABC's Grey's Anatomy took back its dominant lead over CBS' CSI: Crime Scene Investigation, almost doubling its adult 18-49 rating - a Nielsen 9.5 rating / 23 share over CSI's 5.0/12. That said, CBS put CSI into rerun mode, while Grey's featured the new "Don't Stand So Close to Me."

For the night, ABC easily took top honors with 5.8/14 - almost one and a half points better than second-place finishers CBS and NBC.

For the first time, NBC was able to show off its new four-show Thursday comedy block: My Name is Earl, The Office, Scrubs, and 30 Rock. Rock, the struggling rookie show, was able to make slight gains to a 2.7/7, rising above its season average.

This put NBC into a tie for the night with CBS, with a 4.4 rating. CBS did a smidge better in terms of share, grabbing an 11.2 number.

NBC continued to dominate the 10 p.m. time period, with ER posting 5.8/15 numbers. That bested Men in Trees, the low-rated Anne Heche-starring drama, which soared to new heights sitting behind the Grey's Anatomy audience, with a 3.8/10. Trees had been a poor player on Friday nights.

Fox, however, continues to suffer on Thursday, finishing well behind the other three networks with a 1.8/4 number for the night. A double run of Fox's first-year comedy 'Til Death posted a slightly better 2.0/5 rating and share numbers among 18-49 viewers, while The O.C. continued its ratings-challenged life this season with a 1.6/4.

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.