interesting educational informal podcasts for long car drives?

iTunes U in general:
http://itunes.stanford.edu/

CUNY lecture series:
http://www1.cuny.edu/mu/podcasts/category/cuny-lecture-series/

overwhelming quantity. can u plz recommend specific lectures from them?

I often get those Great Courses and suchlike for free from a public library. Saved me from despair during a year of long commutes.

Lately on long car trips we've become partial to the Stuff You Missed in History, Stuff You Should Know, etc. type of podcast. May be lighter than what you were looking for but they are pretty easy to find.

which great courses did u like? i'm more willing to check them out than i sound above :p -- i have mcwhorter's story of human language waiting to be listened to

Ones I've listened to and would recommend...

Robert Caro:
http://www1.cuny.edu/mu/podcasts/2009/10/16/robert-caro-biographer-of-our-time/

Peter Gelb (short):
http://www1.cuny.edu/mu/podcasts/2008/06/25/peter-gelb-take-risks-to-succeed/

Looks like the Stanford one I was thinking of (Seymour Hersh) is gone.

In our time podcasts from BBC radio 4. Pick any you like the subject of.

Secret History of Hollywood has long 5 hour eps about Hitchcock, Warner Bros, Universal Horror, lots of good stuff. Well researched & very straight-ahead just the facts stuff, not too precious.

The History of Rome podcast started out great but the episodes around the end of the Third Punic War have a high pitched whine via Pocket Casts and I had to bail. I need to try with a different app to see if it's the files that Pocket Cast is downloading.

Seconding In Our Time , also A History of the World on 100 Objects.

I wanted to like the Stuff casts but I usually feel like they are just reading a wiki. They are just barely engaging enough to be good for falling asleep to though.