Deliberate mistake: Lily was an infant for all of season 5, but beginning with this season, she is around 5 years old. The show didn't jump forward in time, because JT states in a season 5 episode that he is 19, and in the episode this season where he and Rich go to Mexico, he states that he is almost 20, as well as Al and Mark are both still in high school.
Step by Step (1991)
Episode list - season 4
Starring: Patrick Duffy, Brandon Call, Suzanne Somers, Staci Keanan
Genres: Comedy
More mistakes in Step by Step
Jean-Luc: What do you think?
Carol Foster Lambert: I think you look like Barbara Eden from "I Dream Of Jeannie."
Jean-Luc: Well, I think you look like Crissy from "Three's Company".
Trivia: Brandon Call's mom did not allow the hair and makeup department to style his hair for each episode. She insisted on doing it herself.
Question: Who is the brunette kid in the yellow shirt in the beginning? It's supposed to be Marc but it's not.
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Answer: From what I've read, the kid in question was the original actor cast to play Mark and was intended be closer in age to Brendan. For whatever reason, they recast the role with Christopher Castile and didn't bother removing the original actor from the beginning of the opening credits. I guess they figured people would just assume the kid was one of Brendan's friends.
Phaneron ★