Several shows hit season or series lows last night, including “American Idol,” “Dancing With the Stars,” “NCIS,” “Law & Order: Criminal Intent” and “Law & Order: SVU.”

Fox won, of course, with “American Idol” (9.9 rating among adults 18 to 49, according to Nielsen overnights) and “House” (9.9). “Idol” was down 10 percent compared to last week,