When Barney shows his revolver to the man on the train, he is wearing it on his left hip. Later, in Andy's office, he pulls back his jacket revealing it is now on his right hip.
When Barney arrives in Mayberry on the train, the passenger cars are painted in the livery of the Union Pacific Railroad, obviously since it was filmed in the Los Angeles area. However, the UPRR does not service North Carolina having no lines east of the Mississippi River.
The correct colors would more properly have been cream and green, of the Southern Railway, or the gold and black of the Seaboard Coast Line.
In 1945, the Southern Railway Company sold most of the remnants of the branch to the Washington and Old Dominion Railroad, the successor to the Washington and Old Dominion Railway.
The Central of Georgia became part of the system in 1963, and the former Norfolk Southern Railway was acquired in 1974.
The correct colors would more properly have been cream and green, of the Southern Railway, or the gold and black of the Seaboard Coast Line.
In 1945, the Southern Railway Company sold most of the remnants of the branch to the Washington and Old Dominion Railroad, the successor to the Washington and Old Dominion Railway.
The Central of Georgia became part of the system in 1963, and the former Norfolk Southern Railway was acquired in 1974.
It's highly unlikely that a little hick hotel like Mayberrys would have a luxury suite like Teena's; that includes a foyer, a bar, and anterooms.
Andy tells Barney he ought to come "down" to Mayberry on his vacation. But Mayberry is actually north and west of Raleigh.
Andy and Barney discuss how Barney does not want a big deal made of the fact that he's coming back to visit Mayberry. This should not be an issue because Barney had already returned to Mayberry in season six, and no town celebration was made of it then.