Fast National ratings for Wednesday, June 10, 2009.

ABC may need to look into airing nothing but "Wipeout" throughout the summer, at least until it cripples the network, "Who Wants To Be a Millionaire"-style. A double-dose of the summer reality hit kept ABC competitive with FOX's two-hour "So You Think You Can Dance."

Among adults 18-49, FOX averaged a 3.3 rating, beating the 2.4 rating for ABC. NBC's 1.7 rating was third in the key demographic, beating the 1.5 rating for CBS and The CW's 0.5 rating.

Overall, FOX averaged an estimated 8.7 million viewers to go with a 5.3 rating/9 share. CBS' 4.7/8 was good for second, beating the 4.1/7 for ABC. NBC's 3.2/6 and the 0.8/1 for The CW trailed.

FOX started the night in first with a 5.1/9 for the first hour of the first performance episode of "So You Think You Can Dance." That's a lot of "firsts," but FOX was also first for the hour among adults 18-49.  ABC's "Wipeout" was a close second with a 4.6/8. NBC's "I'm a Celebrity... Get Me Out Of Here" and CBS' repeats of "The New Adventures of Old Christine" and "Gary Unmarried" tied for third with a 3.1/6 (advantage NBC in total viewers and adults 18-49). The CW trailed with "America's Next Top Model."

"So You Think You Can Dance" improved to a 5.6/9 for FOX in its second hour. That was enough to tie with CBS' "Criminal Minds" overall, though the FOX series had a big advantage in the key demo. ABC's second hour of "Wipeout" did a 4.8/8 and also improved among adults 18-49. "NBC's "Im a Celebrity" was roughly flat and finished fourth in the hour in all measures. The CW repeat of "Hitched & Ditched" was fifth with a 0.8/1.

CBS took first at 10 p.m. with a 5.5/10 for "CSI: Miami." NBC's "Law & Order" repeat was second, topping the 2.8/4 for "The Unusuals" on ABC.

All ratings information comes from preliminary Fast National Nielsen data, which includes live and same-day DVR viewing. All numbers are subject to change.