NBC’s five-night reality experiment “Celebrity Cooking Challenge” has ended after only three days. The network is moving the Thursday and Friday episodes of the culinary competition reality series “Cooking” to NBC.com and replacing them with sitcoms and the more successful reality series, “Deal or No Deal.”

On Thursday NBC is scheduling “Will & Grace” and “My Name Is Earl” into the 8 p.m. (ET) block, while on Friday the network will run an episode of “Deal” in the time period.

On Wednesday at 8 p.m. “Cooking” scored a 1.5 preliminary national rating in adults 18 to 49, a number that includes live-plus-same-day viewing, according to Nielsen Media Research. NBC was fifth in the time period in the demo on Wednesday. “Cooking” was also down 46 percent from its 9:02 p.m. debut on Monday.