A body with no identification is found in a local reservoir, and a couple fall victim to a brutal killer in their own home. Frost is assigned a new, female, West Indian detective constable, Ronni Lonnegan, and gets off to a bad start with a few racially-insensitive remarks. He then reluctantly accepts the help of a psychological profiler, psychiatrist Pam Hartley, who he met at a conference. Meanwhile, there is an inspection of Denton Police underway, and Frost's old-fashioned methods are not endearing him to the inspector, so Supt Mullett is forced to give him more support than usual.
Quest roles:
David Gooderson(Derek Simpkins), John Lyons(Toolan), Barry Jackson(Walter Peter), Arthur White(Ernie Trigg), Kate Maberly(Melanie Monkton), Barrie Ingham, Jimmy McKenna, Susan Penhaligon(Pam Hartley), Julian Wadham, Michelle Joseph(WPC Ronnie Lonnegan), Michael Cochrane(Babcock, HMI), Jason Merrells(Mike Patterson), Gerrard McArthur(Paul Harris), Annette Ekblom(Fiona Monkton), Jonjo O'Neill(Jeffrey Meadows), Billy Riddoch(Hammond)