When a Stranger Calls manages to scare the stuffing out of the audience - the film is authentically terrifying - without pouring more than a demi-carafe of gore. [22 Oct 1979]
The first part of this film is an exceedingly taut little chiller that stands on its own, and in fact was once a short film entitled The Sitter. Director Fred Walton decided to expand the clever premise into a feature and, unfortunately, that is where the film begins to fall apart.
60
Washington Post
Unnamed
Director Fred Walton sets the audience up early for a 20-minute reign of terror and gracefully shocks them out of their seats in a final blitz. But he packs the middle with drawn-out dialogue and mindless series of chases and escapes that do little more tan pad the feature film into feature length. [19 Oct 1979, p.31]