An Affair to Dismember - S1-E8
Other mistake: During the massacre at the theatre, Chucky is stabbing people from under the seats, presumably severing major arteries in the leg/groin area, thus killing the people. However, during the chaos, we see him stab up and an Asian woman screaming for a split second and her chest is covered with blood. How the heck did that happen from being stabbed in the groin area only a second prior?