Thursday reality ratings slip

Fox's "So You Think You Can Dance" and CBS' "Big Brother" both slipped Thursday on a night mostly filled with repeats. "Dance" (7 million viewers, 2.5 preliminary adults 18-49 rating) was the top-rated show, though dropped 14%. "Brother" (5.6 million, 1.9) fell 17%. ABC also aired a news special, "J.K. Rowling: A Year in the Life" (4.4 million, 1.1). Fox won the night in the demo, followed by CBS, NBC and ABC.