Mrs. Wharton and the Lesser Breeds - S10-E17
Other mistake: Candy is fighting with two of Billy Buckner's men outside their mountain cabin. It is obvious that artificial lighting was used because each man casts two shadows.
Other mistake: Calvin Dorcas enters the Ponderosa home and slumps into a chair. Ben asks, "What happened to you?" Calvin explains that he fell into the river while searching for his granddaughter. However, his clothes and his hair are completely dry.