College Professor Michael Lane plots to kill his wife and things seems to go off without a hitch when he begins receiving alarming blackmail messages from an unknown person. Each time he silences who he believes to be his tormentor, the messages return and he becomes ever more frantic to unmask the blackmailer.
WRITTEN BY: Brian Clemens
DIRECTED BY: John Scholz-Conway
PRODUCED BY: John Sichel
MAIN CAST: Patrick O'Neal (Michael Lane), Angharad Rees (Stella Mason), Michael Kitchen (George Newton), Gerald Sim (Peterson), Gary Watson (Inspector Rush), Patricia Donahue (Elizabeth Lane), Terry Wright (Det. Constable Waters)