When a Stranger Calls is a 1979 horror film starring Charles Durning, Carol Kane, Colleen Dewhurst, and Tony Beckley. Watching this is a tense experience. Kane is a babysitter who can't reach the parents of the children she's babysitting and who keeps getting anonymous calls asking her, "Have you checked the children?" Durning is the police officer she appeals to for help. The first 20 minutes are "now consistently regarded as one of the scariest openings in horror movie history" according to Wikipedia's sources.
The New York Times says, "The movie is full of fine actors, but they all seem to have been wedged into the wrong roles" but calls it "an energetic first film". Moria gives it 2.5 out of 5 stars and says, "While it is occasionally effective, When a Stranger Calls is also a somewhat listless film."
Rotten Tomatoes has a critics rating of 33%.