Continuity mistake: Near the end, Charlie, badly wounded and after killing Jack and Sheila, staggers from the house. As he stumbles towards his car, there is a gated driveway with a car parked in it. A few seconds later, the car is no longer there. (01:33:45)
Continuity mistake: When Ronald Reagan smacks Angie Dickinson, he smacks her on the left-hand side of her face. However, in the next shot, Dickinson is holding her right-hand cheek in pain.
