In their prequel episodes they talk about comments from listeners for the previous episodes and tell you what movie they discuss next, so that you have a chance to watch it beforehand.
Now Playing just is such a good podcast, that I find it hard to find a podcast I can listen to. They just have such a good chemistry, it is well edited, they have a great way to express themselves. They made their research. I have stopped listening to other podcasts when I had the feeling that they didn't really bother spending some effort on reviewing the movie or telling facts I know are false.
Now Playing has some podcasts which were only available a limited time during their donation drives. Sadly I missed some great retrospective series during my podcast hiatus. I really would have liked to listen to their Planet of the Apes retrospective series.
Movieing On is about "movies from 1999 or earlier"; this was recommend by the The Weekly Planet guys, I think, but have not yet started listening to this one.