First broadcast 19th December 2002.
Dr Hill is convinced the attacks bear the hallmarks of a different killer - until a bizarre link suggests more deaths will follow.
Hermione Norris ... DCI Carol Jordan
Robson Green ... Dr. Tony Hill
Daniel Ryan ... Paul Gregory
Alan Stocks ... Don Merrick
Doreene Blackstock ... Annie Reiss
Joe Tucker ... DS O'Brien
Holly Scourfield ... Hannah Kielty
Tom Chadbon ... John Brandon
Jacqueline Cotter ... Mrs Kielty
Christine Mackie ... Nicola Hibbert
Steve Huison ... Oliver Hibbert
Andy Williams ... Luke Ashworth
Susan Brown ... Jean Lawson
David Williams ... Juror
Mark Letheren ... DS Kevin Geoffries
Elaine Claxton ... Maggie Thomas
Lloyd Owen ... Spencer Watts
Mark Penfold ... Dr Ashley Vernon
Albert Welling ... David Lawson
Rachel Drury ... Trudy Hibbert