The model of Universal Studios has a large sign reading "GATE B." In reality, the gate sign reads "Universal Studios NORTH GATE."
Mr. Rogers: There are no such things as real monsters. There aren't even any live dinosaurs anymore, even though some people like to get dressed up in a costume to look like one.
In this episode, Fred changes back into his jacket and shoes earlier than usual. After he does this, he walks off the set and shows the viewers the toy model neighborhood used at the beginning and end credits of each episode, and when we visit another place in the neighborhood.
Mister Rogers puts on a lab coat to start the program. In the old days (1968-1975), this was a common device Rogers used to start some scientific venture.