Last Friday's ep. was a scream. As I was visiting the dentist the next day I was espeically interested in the "How do they train dentists, who do they practise on?" bit.
Hope you can find the link, it was very amusing, though I think his hygiene pracitses need a bit more work...
Episode guide. Pete Investigates: Dental School.
You can find the video here, but I'm not sure for how long.