12. 'The World Series Defense' (Season 5, Episode 6)
Two of Charlie's funkiest alter-egos pop up in this episode: his "Green Man" mascot, ready to show up the Phillie Phanatic (called the "Phrenetic" here to avoid a lawsuit from Major League Baseball); and his best impression of a country lawyer. It also benefits from a classic flashback device, with everyone in deep, deep trouble before the opening credits, already having to defend themselves before an actual authority figure. Their explanation for why they owe over $1000 in parking fines starts as a story about a trip to a ballgame, and ends with secret, corpse-strewn Scooby Doo tunnels under Philadelphia, because the gang assumes that the judge — and the television audience — is getting bored with what really happened.