The war in Iraq continues to throw network programming into disarray.

NBC shifted its entire slate of original "Must-See TV" shows from Thursday night to this coming Tuesday, and ABC has put Nightline on hold at 11:35 p.m. for special news coverage while host Ted Koppel is "embedded" with Army troops in the Iraqi region.

NBC said it was prepared last night and aired repeats of Friends, Scrubs, Will & Grace, Good Morning Miami and ER.

"Prior to the bombing, we made a schedule change, assuming that the war would have started," said NBC spokeswoman Rebecca Marks. Marks said a decision on what to do with Friday's programming most likely will be made early today after assessing the situation in Iraq.

Network execs are worried about overdoing it.

"If there's no compelling video, there's really not much of a reason to cut in," said one network executive.

CBS spokesman Chris Ender said late yesterday that no decision had been made yet on whether tonight's scheduled NCAA basketball broadcasts will air as planned on CBS -- or be moved to ESPN under a deal brokered earlier this week.