The Killer Is on the Phone is a 1972 giallo film directed by Alberto De Martino. It was released in the U.S. in July, 1975.
The film is set in Bruges, Belgium, and stars Telly Savalas and Anne Heywood. The story follows an attractive actress who suffers from amnesia and paranoia triggered by a chance encounter with a professional assassin, who in turn begins to follow her with his knife.