There is no final-season bump for ABC’s Desperate Housewives. Last night’s episode of the veteran dramedy (2.7/6 in adults 18-49, 8.5 million viewers ) was down 10% in the demo from last week. It matched the series low in 18-49 and hit a new one in total viewers. Pan Am (1.9/5, 6.4 million) tumbled 27% in 18-49 from last week, becoming the latest new drama this season to drop to dangerously low ratings levels. The other ABC shows also slipped but not as much: America’s Funniest Home Videos (1.4/4) was down 7%, Extreme Makeover: Home Edition (2.0/5) was down 5%.