Brian Williams

Perhaps the world simply didn't want to watch one more network-TV newsmagazine. 

NBC is canceling Brian Williams' newsmagazine "Rock Center" after a brief, uncertain existence, as it couldn't find a consistent time slot on the network's prime-time schedule, the Associated Press and other media reported on Friday.

"Rock Center" debuted on Halloween in 2011 and news executives said they wanted to be patient because they reckoned the show would require time to find an audience. Bob Costas' interview with Jerry Sandusky about the Penn State child sexual-abuse bombshell proved to be the program's finest moment.

NBC presented the show on Monday, Tuesday, Thursday and Friday nights, underscoring both its desire to make the program work while revealing its frustration at locating viewers.

For the popular Williams, the end of the run represents a rare setback though the blame could hardly be laid at his feet. He did on the show what he does on his ratings-leading NBC Nightly News programs: deliver the news in a crisp, professional manner. 

Williams has succeeded at every stop of his career with NBC News, showing the wide versatility as a broadcaster to get laughs on Saturday Night Live while retaining his credentials as a much-trusted evening-news anchor.