Rover Boys - S1-E18
Other mistake: David's teacher is called Mrs. Fraser in some scenes and Miss Fraser in other scenes.
The Adventures of Ozzie & Harriet (1952)
1 mistake in Rover Boys
Starring: Harriet Hilliard, Ricky Nelson, David Nelson, Ozzie Nelson
Trivia: In the later seasons, almost every scene taking place at the Dobson and Kelly law office or in the Emporium or other local business is preceded by the same clip of a downtown street showing "First Bank" and a passing bus.