Case file · Series 10, Episode 2 · Season 10, Episode 2
The Animal Within
An Australian niece arrives to visit a wealthy uncle and learns that his friends have already been told she died in a plane crash.
The 60-second case card
Should I watch this one?
The case turns a circle of apparently devoted friends into rival narrators of one man's estate.
- Best for
- Conflicting wills · River death · False report
- Mood
- Classic
- Team
- DCI Tom Barnaby with DS Ben Jones
- Spoiler guidance
- Read the premise freely; open the marked sections only after watching. Check the linked provider advisory for further viewing information.
Why it matters
The case turns a circle of apparently devoted friends into rival narrators of one man's estate.
Faith Alexander travels from Australia to surprise her uncle, photographer Rex Masters, only to discover that Rex has reported her death in an aircraft disaster. Before she can demand an explanation, Rex is found in the river beside his house at Bellville Lock.
The inquiry uncovers a remarkable collection of wills, each apparently leaving the whole estate to a different friend. Barnaby and Jones must decide which promises Rex meant, which were performances, and why a living niece was removed from the story before her plane had even landed.
Break the seal: reveal the finding
Who was the killer in The Animal Within? (spoiler)
The contradictory wills are deliberate provocations rather than simple legal confusion. Rex's treatment of the people around him—and an older family grievance—gives the killer both motive and opportunity.
Spoiler-safe viewing companion
Three questions to carry into the episode
Three spoiler-safe questions for your rewatch.
- Place
What does Bellville conceal?
- Theme
Which details could have more than one meaning?
- Teamwork
Watch DCI Tom Barnaby and DS Ben Jones: who notices what?
More episode detailsProduction, cast, deaths and filming information
Credits, context and checked facts
Production and cast
- TV series
- Series 10
- Episode number
- Episode 2
- Written by
- David Hoskins
- Directed by
- Renny Rye
- Listed transmission date(s)
- 19 January 2007
- Reported filming period
- June–July 2006
- Detective
- DCI Tom Barnaby
- Partner
- DS Ben Jones
- Pathologist
- Dr George Bullard · Barry Jackson
- Principal setting
- Bellville
- Casebook tone
- Classic
Sources accompany the production credits and filming links.
Fictional settings and real filming places are listed separately. Filming links include 2 mapped areas; 3 exact sites.
Credits and archive connections
- Writer credits9 episodes credited to David Hoskins
- Director credits23 episodes directed by Renny Rye
- Release positionCase 53 of 144
- Story characterClassic · Conflicting wills · River death
- Location evidence3 exact screen-use matches
Hambleden Lock and its lock keeper's cottage create Rex Masters's waterside home and the principal crime-scene setting.
Village houses supply the Carnack home, Jeremy Thacker's cottage and the Mama Lucy Museum.
Sources for the production file
Published episode chronology and credits ↗Official ITV programme page ↗Filming-location reference index ↗Credits follow the linked chronology. Dates can differ between territories. Consult original credits for story, teleplay and adaptation wording. External synopses may contain spoilers.
Selected episode credits
The Animal Within cast
These selected cast entries link to their published profiles. They do not include every name shown in the end credits.
Jane Wymark
Adam Farr
Samuel West
Linda Bassett
David Troughton
Richard Johnson
William Hope
Emily Woof
Lisa Eichhorn
Freda Dowie
John Cater
Helen Masters
Malcolm Stoddard
Roger Bingham
Maggie Holland
Mae Wright
The performers behind this case
Core cast
Follow the cast links for full actor and character guides.
John Nettles
Tom Barnaby · Detective Chief Inspector- Bergerac
- Poldark
- Royal Shakespeare Company
Jason Hughes
Ben Jones · Police Constable · Detective Sergeant · Inspector- This Life
- Marcella
- The Pact
Barry Jackson
Dr George Bullard · Police pathologist- Cathy Come Home
- Doctor Who
- Barry Lyndon
Image credits identify the licence used. No programme publicity stills are reproduced.
Forensic team
Dr George Bullard
- Credit
- Resident pathologist
- Played by
- Barry Jackson
Spoiler-controlled deaths
Deaths recorded in this case
3 people die in this case, according to the linked death record.
Break the seal: reveal the list of deaths
- Rex Masters
Murder · Drowning
Performer check- Rex Masters: Richard Johnson
- Miles King/Eileen Carnack×2
Murder · Stabbing or impalement
Performer check- Miles King: David Troughton
- Eileen Carnack: Linda Bassett
Break a second seal: reveal the verified killer
Who was the killer in The Animal Within? (spoiler)
Jeremy ThackerJeremy drowned Rex Masters to stop photographs of his mother reaching the press, then killed Miles King when Miles pursued the evidence. Eileen Carnack died in the same attack as Miles and is treated as Jeremy's third victim rather than part of the inheritance dispute.
Verified motive
Jeremy killed Rex to stop humiliating photographs of his mother being published and protect her reputation. He killed Miles when Miles pursued the photographs and evidence of Jeremy's guilt; Eileen died in the same attack rather than from a separate inheritance motive.
Verified important clue
Archive case 53 · checked 16 September 2026Rex Masters's photographs of Lucinda ThackerThe images are the material Rex threatened to sell to the tabloids, replacing the inheritance theory with Jeremy's motive to protect his mother's reputation; the false alibi he offered Janet then serves his own movements as well as hers.
Verified decisive clue
Archive case 53 · checked 17 September 2026Rex Masters's photographs of Lucinda ThackerThe images are what Rex threatened to sell to the tabloids, replacing the inheritance theory with Jeremy's motive to protect his mother's reputation. The false alibi he supplied for Janet then collapses against his own movements, exposing Rex's murder and the later joint attack on Miles and Eileen.
Verified death and discovery order
Archive case 53 · checked 16 September 2026- deathRex Masters is drowned
Jeremy kills Rex to stop photographs of Jeremy's mother reaching the press.
- discoveryThe inheritance dispute supplies a false route
The family will and competing claims initially make Rex's death appear tied to the estate.
- discoveryThe photographs reveal Jeremy's motive
The inquiry traces the compromising images and the reputational threat Jeremy was trying to suppress.
- deathMiles King and Eileen Carnack are killed
Jeremy kills Miles as Miles pursues the evidence, and Eileen dies in the same attack.
- discoveryThe false alibi collapses
Jan and Jeremy's account no longer fits the movement and evidence linking him to the deaths.
- discoveryJeremy confesses to the sequence
His account connects Rex and Miles to the photographs while keeping Eileen's death in the joint attack separate from the inheritance theory.
Real place → fictional identity
Where was The Animal Within filmed?
Hambleden Lock
Used as: The lock and river create Bellville Lock, where Rex Masters is found.
Representative photograph of the real filming location; the exact camera angle or building may differ.Hambleden Lock keeper's cottage
Used as: The waterside cottage represents Rex Masters's home.
Representative photograph of the real filming location; the exact camera angle or building may differ.
Village houses
Used as: Several properties become Eileen Carnack's home, Jeremy Thacker's cottage and the Mama Lucy Museum.
Representative photograph of the real filming location; the exact camera angle or building may differ.Sources accompany the identified filming places.
Wider filming areas