Jefferson says "now Marcy, you might like that one, it's a film about women", when Al, Peggy, Marcy & Jefferson are sitting on the couch looking for a movie to go to. That is a nod to the actress Amanda Bearse, she is a lesbian & publicly came out a few months after this episode aired.
Lindbergh kid's reference that Bud makes from the milk carton is regarding the actual missing child of Charles Lindbergh.
Woody Allen's reference by Bud is regarding the time the director was involved in a relationship with his adopted daughter during the time of this episode.
This episode was taped on October 2, 1992.