Although it is one of the series' best known quotes, this is the only episode of the entire series in which Jan says, "Marcia, Marcia, Marcia!" and she only says it once. Jan's feelings of inferiority when compared to Marcia were heavily parodied in The Brady Bunch Movie (1995), which used the line much more extensively.
The eerie background music when Jan's inner-voice is speaking was later used in the flying saucer (UFO) episode, Out of this World.