Torn Between Two Mothers - S5-E14
Continuity mistake: At the end of the episode, Frank is talking to his mother in the kitchen, and she sits down at the table. The green jacket on the chair behind her keeps changing positions between shots.
Step by Step (1991)
1 mistake in season 5
Starring: Patrick Duffy, Brandon Call, Suzanne Somers, Staci Keanan
Genres: Comedy
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".
Question: Did they ever explain what happened to Brendan, who was missing this season?
Answer: The actor that also played Brendan quit acting altogether.
Answer: According to the SBS website, Brendan's disappearance was never really explained. He just kind of faded out. He was hired as the cute "little" one and as he got older he wasn't as cute. When the Lamberts had the little girl, they got their cuteness factor back and didn't need as many kids around.
Carol and Frank continued to tell people they had seven children throughout the remainder of the show's run, but they never referred to Brendan after season 6.