Plot summary
On Halloween, Joel knocks himself unconscious while chasing after an overage trick-or-treater who sprayed silly string on him when Joel tried giving him only a dime. The next day, his slick twin brother (and polar opposite) Jules shows up. He talks Joel into switching identities like they did when they were kids. Jules (as Joel) pursues Maggie, while Joel (as Jules) gets jailed and ends up being given an impromptu psychoanalysis by Sigmund Freud. It turns out to be just a dream. Joel does not have a twin brother, but the experience affects his relationship with Maggie. Meanwhile, Chris prepares for an old friend from his hometown who had committed a string of bombings ten years before (the trick or treater from earlier). He wants Chris's help in turning himself in. The title is a takeoff of François Truffaut 's film Jules et Jim.
Credits
Adapted from Wikipedia contributors, List of Northern Exposure episodes. HTML formatting and reference markers removed.