A Few of My Favorite Things - Late Night Edition

What are some of your favorite late night TV shows? Past or present, talk shows, re-runs, infomercials, whatever. Personally, my top vote goes to The Late Late Show with Craig Ferguson. Full disclosure: I don't watch it late at night. I record it and watch the next morning because I'm old and it's on after my bedtime. When I was a kid the local PBS station would run Monty Python at 11 pm on Fridays and my brother (the Semi Hatrack) would stay up to watch that.