As noted in several threads in this forum, various shows have had episodes delayed due to Sandy. In most cases, the networks have simply delayed the scheduled episodes by a week or so. Unfortunately, if your TiVo did not receive an updated schedule before the scheduled time for program airing, your TiVo will 'believe' that the episode has already aired, and if you are using a default Season Pass for the series (or have the SP set so that only New episodes are recorded), you will NOT record the actual airing of episode if it is in the next few weeks (see the 28-day rule).
There are two ways to mitigate this problem:
1) Check the schedule shortly before the next airing of the series and manually force recording or
2) Temporarily change the SP to Record All Episodes. If the selected station also airs past seasons of the series in non-prime time, you may need to delete the unwanted episodes. However, assuming your TiVo is not almost full, this option should allow you to not miss the delayed episodes.
Once all the delayed episodes have been aired, it should be safe to use your normal SP settings.