Any time Trey Parker and Matt Stone produce an episode that takes the air out of Hollywood gasbags, it's a winner.
Leftist bloviator Rob Reiner comes to town on a crusade to keep kids from smoking. The whole time he's talking about making sure everyone is protected from the unhealthy effects of smoking, he's stuffing his fat face with greasy burgers and fries. In fact he's so fat he can't even get out of his chauffered limousine without having his aid grease him up so he can slip out.
But they don't let Big Tobacco off the hook, either. Reiner and the boys take a tour of a cigarette company and it's all jolly-ho for the corporate PR flack and the line workers.
As usual, they spare nobody.