You think some of the contestants on Dancing with the Stars are terpsichordian-challenged, that they look like klutzes? Well, some do. And you might think you can guess that a guy like Jason Alexander would be a complete joke on the dance floor. After all, as George on Seinfeld, did he ever seem like he could make it across the dance floor without tripping on his shoelaces?

Well, the man can move. On this week's episode of Bravo's Step It Up & Dance, Jason Alexander will present his credentials as a guest judge. He'll challenge the contestants to do what he's done -- very successfully in his career -- learn musical theater choreography.