ABC has released the official description of episode 3.10:

“Just a Sliver” — The Walkers encounter some scheduling conflicts on Thanksgiving, leaving Nora and Sarah to celebrate alone, until Elizabeth endures a medical emergency that brings the family together, on “Brothers & Sisters,” SUNDAY, DECEMBER 7 (10:01-11:00 p.m., ET) on the ABC Television Network.

From Mediaweek:

ABC came in at typical Sunday levels with its combination of NASCAR (Viewers: #2, 7.37 million; A18-49: #3, 2.4/ 6 from 7-8 p.m.), Extreme Makeover: Home Edition (Viewers: #3, 10.21 million; A18-49: #4, 3.4/ 8), Desperate Housewives (Viewers: #2, 16.55 million; A18-49: #2, 6.1/13), which featured the highly publicized fire, and Brothers & Sisters (Viewers: #3, 10.07 million; A18-49: #2, 3.7/ 9). Unfortunately, retention for Brothers & Sisters out of Desperate Housewives was lagging at 61 percent in both total viewers and adults 18-49.

From Mediaweek:

ABC’s Sunday line-up — NASCAR (Viewers: #2, 8.15 million; A18-49: #2, 2.2/ 6), a half-hour edition of America’s Funniest Home Videos (Viewers: #3, 6.62 million; A18-49: #4, 1.9/ 5), Extreme Makeover: Home Edition (Viewers: #3, 10.85 million; A18-49: #4, 3.5/ 8), Desperate Housewives (Viewers: #2, 15.71 million; A18-49: #1, 5.9/13) and Brothers & Sisters (Viewers: #3, 10.23 million; A18-49: #2, 3.7/ 9) — came in at typical Sunday levels. Of negative note, in particular, for Extreme Makeover: Home Edition was a fourth-place finish in the demo. As for Desperate Housewives, don’t we all wish that Teri Hatcher’s Susan would be one of the victims in next week’s fire?