The episode contains two errors. When the "Festival" breaks out, the mob begins hurling stones at the landing party. A large "rock" made of papier-mâché accidentally hits one of the "Enterprise" security personnel in the head. The actor stayed in character and kept running to ensure that the take was not ruined. When the landing party rests in a bedroom at Reger's boarding house, the windows are blacked out in all wide shots, but clearly transparent and showing the street outside in all close-ups.