I'm a huge Jerry Seinfeld fan. Of late, Comedians in Cars Getting Coffee has become my new obsession. Some episodes are better than others but all together, it's a great show.
The Carl Reiner / Mel Brooks episode is particularly awesome. The fact that they've been friends for so long combines with each one's individual level of awesomeness makes this episode particularly special.
In the episode, Mel tells a joke that's become one of my favorites. Check it out.