How can I return all my Podcasts to iTunes?

I just transfered to iTunes 11; yet, now all of my Podcasts are gone. Since there has been no problems with it all in the beginning, suddenly the entire Podcast List is seen no longer.

No: I have not changed to a different version of iTunes 11.

No: There has no change(s) rendered to the Podcasts (until this,it was not even asked).

As the result, let me make one assumption: Due to iCloud not being due to be renewed until September 2013, it (the cloud) lost them...

I love these Podcasts so much; in fact, they are the number one reason to use iTunes. Thank you for your help, Lisa S Kelly