Continuity mistake: The babysitter answers one of the early calls saying "Robert, I don't think this is very funny." The pencil and papers have completely changed position on the table. (00:07:30)
When a Stranger Calls (1979)
Directed by: Fred Walton
Starring: Charles Durning, Carol Kane, Rutanya Alda
Question: At the beginning, Jill tells the police that she believes the caller is watching her through the windows. Since he calls her, how is this possible since cell phones did not exist at the time this movie came out?
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Answer: He could be watching her (potentially with binoculars or a telescope) from a different house or building that had a phone.
TedStixon