When Mr. Judd and Mrs. Schooner are about to leave the Wilson's home, Mr. Judd is shown opening the front door twice.
When the fire chief goes in with the second extinguisher to rescue Mr. Wilson from the store window, there is a small amount of foam on the column next to the curtains. When Mr. Wilson makes his way through the curtains, the amount of foam on the column is substantially more.
Mr. Wilson tells Mr. Judd that he is Jeremiah Wilson's only great nephew. This is not true, since his brother John Wilson moves into the Wilsons' home later in the series.