As I recall, all network programming and even "Jeopardy!" were pre-empted for weeks.
Which reminds me. Can a person watch those episodes now?
There's no place to put this, but for several days NBC dramas were showing the regular credits like TV series used to, with the regular theme music, rather than standardized credits with a preview of the next episode.
Hulu has a lot of shows the next day after they were supposed to be on, and there's a possible chance from On Demand on cable. A lot would probably depend on whether the pre-emption was local (possibly available) or national (not as likely to be available). The only episodes of Jeopardy that are available on Hulu are usually past tournaments, and Wheel isn't available at all.