Well-written storyline includes a guest appearance, a crime mystery, relationship drama – and even some science experiments, in the form of how to make blue sparks appear in your mouth after chomping down on a peppermint life saver. Cameo by the CJCS is a bit odd (maybe he really likes the show), but the writers craft a pretty decent story around it.
Cold open: Woody is annoyed by Norm’s knuckle-cracking. Frasier explains it scientifically (after Cliff’s BS answer), and Woody wants to learn how Carla wristles with her fingers. First she has to crack her knuckles.