While returning the car, Barney and Andy breakdown out in the country. But while being towed "after dark" there is the illusion that they are passing under numerous streetlights which would not be present out in the country.
Andy tells Mrs. Lesch it normally takes about an hour to drive from Mt Pilot, but Mt. Pilot is only 12 miles from Mayberry.
While reading the newspaper, Barney finds an ad for a 1949 Hudson Terraplane. 1938 was the last model year for the Terraplane.