ABC, CBS, Fox and NBC all carried President Obama's remarks from the memorial service in Tucson which ran longer than anticipated and didn't end until ~9:18p ET.
NBC joined '' in progress after the speech. Fox, preempted both the 8pm and 9pm ' ', at 8p with a ' ' repeat and a repeat ' ' at 9p which it joined in progress after Obama finished. Fox's scheduling head tweeted that the preempted ' ' could air as early as Friday.
ABC started 'confirms the preemption.' from the beginning at ~9:20p, and it looks like they will just stretch it out and preempt ' ,' allowing ' ' to premiere on schedule at 10pm, potentially giving it a much better lead-in depending on how much the delay hurt . Update: 's Facebook page
CBS had already schedule repeat comedies from 8p-9p (which it interrupted in the 8pm hour) and moved '' to 9pm and they picked it up from the beginning around 9:20p. A new ' ' began around 10:20p ET.
The fast affiliate preliminary ratings for Wednesday night will be a jumbled mess that won't get sorted out until the final numbers come out, though the numbers for Law & Order:and the premiere of shouldn't change much in the finals since they aired in full at the scheduled time in all time zones.