Yikes. Rough start last night for Fox's new sitcom "Do Not Disturb."

Show that was pretty well batted around by crix drew 4.9 million viewers and 2.0 rating/5 share in adults 18-49 in the 9:30 p.m. berth, according to prelim Nielsens. "Do Not Disturb" sank from its "Til Death" lead-in (6.4 mil, 2.4/7), which in turn gave up significant ground from a solid lead-in from 8 p.m. drama "Bones" (8.9 million, 2.9/8).

"Do Not Disturb" wasn't quite in "Anchorwoman" territory -- the comedy Fox yanked after one woefully low-rated airing last August -- but it's not a promising preem, by any means.

Overall, NBC won the night with another two-hour installment of "America's Got Talent" (11.5 mil, 2.8/8).

Meanwhile, in late night, Barack Obama's visit to "The Late Show with David Letterman" pushed Letterman to a narrow win over "The Tonight Show with Jay Leno." "Late Show" polled a 4.1 household rating/10 share in Nielsen's 55 overnight metered markets to "Tonight's" 3.9/10. Craig Ferguson's "Late Late Show" squeaked past "Late Night with Conan O'Brien" by an even tighter margin (1.9/7 vs. 1.8/6).