Just noticed a blooper in this episode. Just after Mr Roper recites his slogan for the contest, Mrs Roper gets up to answer the door. While she is doing so, the camera pans too far to the left and we can see off set. Not sure what scene is to the left, though.

Video: https://www.youtube.com/watch?v=BRJdxeZBYig at 6m01
Screenshot: https://drive.google.com/file/d/1I9LxfCA4cRhlQkt3jDvHKdwTkLZOoJPV/view

Hard to tell what it is. Could be nothing too.