
Continuity mistake: In the final scene where they are in the desert, the sun hits John Doe first on the left and then on the right side of his face in two different takes.
Continuity mistake: When Somerset, Mills, and John Doe walk away from the car near the end of the film the doors on the passenger side of the car are left open but when Somerset runs to back to the car to meet up with the delivery van the doors are suddenly closed without anyone closing them.

Continuity mistake: When the three protagonists are in the desert towards the end of the movie, as Mills angrily points the gun at John Doe's head, saying to him "You liar, you f***ing liar", some clouds can be seen behind him, but when the angle changes the clouds have vanished.
Audio problem: After the Gluttony murder, both detectives drive to the forensic and have a chat. The audio is slightly out of sync with their lips. Spanish DVD release. Fixed in the Blu-Ray edition.






Answer: Doe claims to represent the sin of "Envy" when he killed Mills wife; he was envious of Mills' normal life, and killed Tracy after failing to "play husband" with her. After that Mills kills Doe by shooting him repeatedly, becoming the embodiment of "Wrath".
Anastasios Anastasatos