Canadian horror film starring Richard Chamberlain as a professor out to prove a conspiracy exists in a huge phone company as they cover up a mad killer that uses high-pitch frequencies on the phone to kill people. The movie resembles Coma with its thriller-like atmosphere and its one person against the world protagonist. As thrillers go, the film is pretty enjoyable, although it is definitely short on logic. You really will need to suspend some disbelief here. Michael Anderson directs(quite a ways down from directing Around the World in Eighty Days if you ask me...which you didn't) with some polish and flair, using the materials he is given to their best. John Houseman is somewhat wasted in the film, but his verbal reparte with Chamberlain is quite amusing. Chamberlain is adequate in the lead. The special effects are...well, not too impressive. Some of the death scenes are over-acted and over-directed, and unintentionally amusing.