Erros de gravação

(at around 45 mins) Connie Anderson enters the downtown L.A. subway station. She first walks into a trolley car, and the car is marked number "5000" inside the car. She then leaves that car, but now the same car is marked "5009" on the outside. Then she walks to her right and boards a different car, marked "5000" on the outside.

While being questioned by the FBI agents Connie goes into her bedroom to change. When she disrobes she is wearing a substantial bra with shoulder straps. She then pulls a dress on over her head and is next fastening the shoulder-less dress around her neck and her shoulders are bare. She has obviously undergone a change in the original undergarment to correspond to the style of dress.

After the FBI agent Stewart is killed, the narrator states there are 3 cases and one dead. In the beginning of the movie the one case is only assigned after Walpo kills the gas station attendant so when Ripley gets the cases assigned there are 2 dead and 3 cases. When the witness Rollis is killed later, the narrator states there are 2 dead and 3 cases where there are actually 3 dead.