Is this the movie where we see the police officer?
Is this the movie where she sees a duplicate of the uniformed officer at the end? I remember that the lead actress tried to tell this officer that people were being replaced, but he didn't believe her. She sees the duplicate right after she has talked to real officer and seems to get a funny look on her face. Then they go to the credits.
I remember that the duplicate officer comes out of the water right before she leaves the officer. I think she thought the invasion was over until she saw the duplicate officer.