6 user

Know Thine Enemy 

The body of a missing schoolgirl is found in a lake wrapped in rubble sacks and chains. An abused wife holds the key, with her husband a major suspect.


Graham Theakston


Elizabeth George (based on "Inspector Lynley Mysteries"), Ed Whitmore




Episode cast overview, first billed only:
Paul Hickey ... Lafferty
Nathaniel Parker ... Inspector Thomas Lynley
Sharon Small ... Sergeant Barbara Havers
Kit Jackson Kit Jackson ... Patrick Middleton
Michael Feast ... Asst. Commissioner Evans
Shaun Parkes ... DC Winston Nkata
Mark Bonnar ... DC Ed Harvey
Barbara Wilshere ... Anna Stevens
Joel Dommett ... Josh Tyler
Robin Kermode ... Tony Stevens
Eleanor Gecks Eleanor Gecks ... Kelly Stevens
Lorraine Stanley ... Maggie
David Earl David Earl ... George
Honeysuckle Weeks ... Tania Thompson
James D'Arcy ... Guy Thompson


Inspector Lynley and Sgt. Havers investigate the death of teenager Sarah Middleton who had gone missing two weeks previously. She was found in a lake and had been dead for three or four days. She had also been sexually assaulted. When a second schoolgirl, Kelly Stevens, also goes missing the police fear they have a predator on their hands. The police focus on Guy Thompson had only recently beaten his wife, Tanya. Havers works on gaining the wife's trust while Lynley learns more about the husband's troubled background. As they continue the investigation, there is growing doubt as to just who is the most dangerous. Written by garykmcd

Plot Summary | Add Synopsis


TV-14 | See all certifications »






Release Date:

18 November 2007 (UK) See more »

Company Credits

Show more on IMDbPro »

Technical Specs




Aspect Ratio:

1.78 : 1
See full technical specs »

Did You Know?


The plot of this episode is clearly based on the Bernardo/Homolka case in Ontario Canada in 1990. See more »

Frequently Asked Questions

This FAQ is empty. Add the first question.

User Reviews

A good send-off
14 January 2013 | by blanche-2See all my reviews

This is the last in the Inspector Lynley series, and I'm sad to see them go. However, the show goes out with a very strong episode.

Lynley and Havers investigate the murder of a teenage girl and the disappearance of another one, this girl a diabetic in need of insulin. Fairly early in the show, they think they have a line on their man -- but how to find where he has stashed the girl and how to get enough proof for warrants becomes difficult. Havers goes to work on the man's wife, a battered wife who won't leave her husband and won't be disloyal to him.

A really good episode, a little different from what the show did in the past, where clues to a murder are found in happenings from long ago. In "Know Thine Enemy," other questions beside that of the identity of the killer are involved and cause friction between Lynley and Havers.

I love Nathaniel Parker and Sharon Small in their roles and also together. They made a terrific team. I'm just sorry it ended.

14 of 14 people found this review helpful.  Was this review helpful to you? | Report this
Review this title | See all 6 user reviews »

Contribute to This Page

Free Movies and TV Shows You Can Watch Now

On IMDb TV, you can catch Hollywood hits and popular TV series at no cost. Select any poster below to play the movie, totally free!

Browse free movies and TV series

Recently Viewed