Case file · Series 4, Episode 4 · Season 4, Episode 4

Who Killed Cock Robin?

A doctor's late-night collision and a body recovered from a well turn two missing men into one unusually tangled village case.

The 60-second case card

Should I watch this one?

The opening question—where did the man hit by the car go?—keeps changing as Barnaby establishes which disappearance he is actually solving.

Best for
Village doctor · Missing man · Community secrets
Mood
Classic
Team
DCI Tom Barnaby with DS Gavin Troy
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 opening question—where did the man hit by the car go?—keeps changing as Barnaby establishes which disappearance he is actually solving.

Dr Oliver Burgess reports hitting a man on the road after a party, but no injured person can be found. The discovery of Robin Wooliscroft, missing for more than a year, at the bottom of a well gives the police a body without explaining the doctor's collision.

Barnaby and Troy work through a wedding party, the Stockard household, the village pub and relationships that survived Robin's disappearance. The two timelines eventually expose how an old killing and a new attempt to conceal it overlap.

  • Village doctor
  • Missing man
  • Community secrets
Break the seal: reveal the finding

Who was the killer in Who Killed Cock Robin?? (spoiler)

The missing pedestrian and Robin's death belong to connected but distinct moments; reconstructing the late-night collision exposes the attempt to protect the earlier crime.

Spoiler-safe viewing companion

Three questions to carry into the episode

Three spoiler-safe questions for your rewatch.

  1. Place

    What does Newton Magna conceal?

  2. Theme

    Which details could have more than one meaning?

  3. Teamwork

    Watch DCI Tom Barnaby and DS Gavin Troy: who notices what?

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More episode detailsProduction, cast, deaths and filming information

Credits, context and checked facts

Production and cast

TV series
Series 4
Episode number
Episode 4
Written by
Jeremy Paul
Directed by
David Tucker
Listed transmission date(s)
9 September 2001
Reported filming period
September–October 2000
Detective
DCI Tom Barnaby
Partner
DS Gavin Troy
Pathologist
Dr George Bullard · Barry Jackson
Principal setting
Newton Magna
Casebook tone
Classic

Sources accompany the production credits and filming links.

Fictional settings and real filming places are listed separately. Filming links include 3 mapped areas; 3 exact sites.

Credits and archive connections

  • Writer credits1 episode credited to Jeremy Paul
  • Director credits3 episodes directed by David Tucker
  • Release positionCase 17 of 144
  • Story characterClassic · Village doctor · Missing man
  • Location evidence3 exact screen-use matches
Newton Magna's centre

Old Amersham introduces the village, while Westlington green at Dinton supplies the place where the body is recovered.

Church and pub identities

St Peter and St Paul at Dinton hosts the wedding scenes; Little Missenden's Red Lion appears as The White Swan.

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

Who Killed Cock Robin? cast

These selected cast entries link to their published profiles. They do not include every name shown in the end credits.

The performers behind this case

Core cast

Follow the cast links for full actor and character guides.

Image credits identify the licence used. No programme publicity stills are reproduced.

Forensic team

Dr George Bullard

Credit
Resident pathologist
Played by
Barry Jackson
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Spoiler-controlled deaths

Deaths recorded in this case

2 people die in this case, according to the linked death record.

Break the seal: reveal the list of deaths
  1. Robin Wooliscroft

    Murder · Other recorded death

    Performer check
  2. Mary Mohan

    Murder · Poisoning

    Performer check
Break a second seal: reveal the verified killer
Series 4 · episode 4 · checked 14 September 2026

Who was the killer in Who Killed Cock Robin?? (spoiler)

Frank Lightbourne · Bridget Wooliscroft

Bridget paid her brother Frank to kill Robin Wooliscroft, and Frank carried out the murder and disposed of the body. Frank later killed Mary Mohan and attacked Sean O'Connell while trying to hide the original crime.

Verified motive

Bridget commissioned Robin's murder when he planned to leave her and reunite with Valerie and their son, clearing Frank's debts in payment. Frank later killed Mary and attacked Sean because their knowledge and the recovered watch threatened to expose his role.

Source: episode transcript ↗

Verified important clue

Archive case 17 · checked 16 September 2026Robin Wooliscroft's stopped watch

The missing watch returns through the village and preserves the time of Robin's death, linking the recovered body to Frank's garage and the later attempts to redirect blame.

Clue source: episode transcript ↗

Verified decisive clue

Archive case 17 · checked 17 September 2026Robin's inscribed watch and its staged chain of possession

The watch fixes Robin's death at 11:05 and survives as evidence passed through the village and repeatedly planted to redirect blame. Reconstructing that chain in front of Frank breaks his account, while Bridget's payment of his debts establishes her instigation and Melvyn's later planting remains a separate offence.

Decisive-clue source: episode transcript ↗

Verified red herring

Archive case 17 · checked 17 September 2026Dr Oliver Burgess's covered-up night-time collision

Burgess admits driving after drinking, striking a person and concealing the crash, so the missing victim initially looks capable of becoming the central death. Sean O'Connell survives that collision; Robin's older disappearance and the later killings instead lead to Frank Lightbourne and Bridget Wooliscroft.

Red-herring source: episode transcript ↗

Verified death and discovery order

Archive case 17 · checked 16 September 2026
  1. death
    Robin Wooliscroft is killed

    Frank kills Robin after Bridget commissions the murder to stop Robin leaving her for Valerie.

  2. discovery
    Robin's remains are recovered

    The body and Robin's watch reopen the disappearance and threaten to expose Frank's role.

  3. death
    Mary Mohan is poisoned

    Frank kills Mary because he believes she knows enough about Robin to reveal the original crime.

  4. discovery
    Mary's death extends the case

    Her death and Sean O'Connell's later non-fatal attack connect the present concealment to Robin's murder.

  5. discovery
    The commission is exposed

    Barnaby reconstructs Robin's last movements and distinguishes Bridget's instigation from Frank's physical killings.

Timeline source: episode transcript ↗
Search the complete deaths index →

Real place → fictional identity

Where was Who Killed Cock Robin? filmed?

Dinton, Buckinghamshire

Westlington village green

Used as: The green forms the centre of fictional Newton Magna and the site where Robin's body is recovered.

Dinton, Buckinghamshire

St Peter and St Paul Church

Used as: The parish church hosts the episode's Newton Magna wedding scenes.

Sources accompany the identified filming places.

Wider filming areas

Places connected to this file