Upon running Jim Howard's finger prints from a book about snakes Barnaby finds that Jim Howard, AKA Jim Howard Hague, had recently finished a 2 year sentence in a federal prison for mail fraud. He then tells Betty to contact his friend at San Quentin prison to find out about Hague's stay there and whom he associated with while in San Quentin. The problem is that San Quentin is a state prison and not a federal prison.
In the final scene Kevin appears to be chopping wood, except that the axe is laying off to the side and he is using a sledge hammer instead. Then he tells Barnaby that he is working on some fence posts. Neither makes any sense.
When Mr. Jones is talking to Ms. Mills in his office, the shadow of a boom mic can be seen bobbing just at the top of the screen.