Factual error: In the opening scene Marshal Dillon walks in Boot Hill cemetery. Dates on grave markers include 1883 and 1882. At the end of the episode Marshal Dillon and Chester discuss an Army deserter who had just been acquitted of a murder that Marshal Dillon was sure he had committed. The army deserter is being sent back to his unit to fight the Sioux and Cheyenne Indians under Gen. Custer. The viewer knows the army deserter will soon die in the Battle of Little Big Horn on June 25, 1876 - seven years before the date on one of the grave markers.
Factual error: There's a 1930s/40s vintage car in the background of this episode. The scene is associated with the marriage. Chester and Matt hear a gunshot and the scene then pans to some buggies, horses and people at the wedding area. Matt and Chester jump on horses and ride out, and if you look closely at the background, there's the car, traveling by for about two seconds.
Visible crew/equipment: When Festus has put a false article regarding a gold strike and the people are rushing out of town, there is a shot in which the view is head on to the street full of riders and wagons as people are leaving town and the roof of the set is visible over the street instead of sky.
Continuity mistake: When the school teacher is questioning the father in court, he places a farmers' almanac on the judge's bench and walks away leaving it. When camera cuts to the judge with a clear shot of where the almanac was left, it is not there.