(TV Series)

Third Girl ()

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After a seemingly neurotic young heiress tells Ariadne Oliver and Poirot that she thinks she may have killed someone, her ex-nanny is found with her wrists slashed.


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Complete, Cast awaiting verification

Hercule Poirot
Norma Restarick
Ariadne Oliver
Claudia Reece-Holland
Matilda Sturridge ...
Frances Cary
David Baker
John Warnaby ...
Inspector Nelson
Nanny Lavinia Seagram (as Caroline O'Neil)
Andrew Restarick
Sir Roderick Horsfield
Tim Stern ...
Alf Renny
Bus Ticket Inspector
Tessa Bell-Briggs ...
Daphne the Waitress
Ysobel Gonzalez ...
Sean Kingsley ...
Jade Longley ...
Young Norma Restarick
Mary Restarick
Miss Battersby

Directed by

Dan Reed

Written by

Agatha Christie ... (based on the novel by)
Peter Flannery ... (screenplay)

Produced by

Michele Buck ... executive producer
Phil Clymer ... executive producer: Chorion
Rebecca Eaton ... executive producer: WGBH Boston
Matthew Hamilton ... line producer
Gabriel Silver ... co-producer
David Suchet ... associate producer
Karen Thrussell ... producer
Damien Timmer ... executive producer

Music by

Stephen McKeon

Cinematography by

Paul Bond ... director of photography

Film Editing by

Lois Bygrave

Editorial Department

Chris Beeton ... colourist
Amar Ingreji ... assistant editor
Shane Warden ... on-line editor

Production Design by

Jeff Tessler

Art Direction by

Miranda Cull
Nic Pallace

Costume Design by

Andrea Galer

Makeup Department

Alison Elliott ... hair and make-up designer
Julie Kendrick ... makeup artist
Eva Marieges Moore ... makeup artist: David Suchet
Marc Pilcher ... makeup artist
Adam James Phillips ... crowd hairdresser (uncredited)

Production Management

Kate Stannard ... post-production supervisor

Second Unit Director or Assistant Director

Sean Clayton ... second assistant director
Danielle Somerfield ... third assistant director
Gareth Tandy ... first assistant director

Art Department

Tim Bonstow ... production buyer
Tone Gibbs ... dressing props (as Tony Gibbs)
Paul Gilpin ... supervising art director
Jim Grindley ... property master
Andrew Lavin ... stand-by art director
Richard MacMillan ... stand-by props (as Richard Macmillian)
Paul Mitchell ... stand-by props
Mike Syson ... dressing props
Gus Wookey ... construction manager
Naomi Moore ... assistant production buyer (uncredited)
Craig Price ... prop storeman (uncredited)

Sound Department

John Downer ... supervising sound editor
Sarah Morton ... dialogue editor
Ashley Reynolds ... boom operator
Andrew Sissons ... sound recordist
Nigel Squibbs ... re-recording mixer
Simon Epstein ... foley editor (uncredited)
Scott Jones ... adr mixer (uncredited)


Tom Lucy ... stunt coordinator

Camera and Electrical Department

Andrew Banwell ... focus puller (as Andy Banwell)
Paul Donachie ... camera operator
Ben Gibb ... clapper loader
Woody Gregson ... clapper loader
Jim Harris ... best boy
Nathan Mann ... focus puller
Ronan Murphy ... camera grip
Gavin Walters ... gaffer
Paul Donachie ... steadicam operator (uncredited)
Rupert Morency ... assistant grip (uncredited)

Casting Department

Susie Parriss ... casting

Costume and Wardrobe Department

Miranda King ... costume supervisor
Philip O'Connor ... dresser: David Suchet (as Phil O'Connor)
Nadine Powell ... assistant costume designer
Soizic Quentin de Coupigny ... costumer cutter/dresser (uncredited)
Diana Wyand ... costume assistant (uncredited)

Location Management

Mark Walledge ... location manager
Chris White ... location manager

Transportation Department

David Grose ... transportation captain (uncredited)
Sean O'Connor ... driver: David Suchet (uncredited)

Other crew

Kim Armitage ... script supervisor
Julie Burnell ... production executive
Faiza Hosenie ... production coordinator
Hannah Ireland ... production secretary
Luke Morrison ... press officer
Ben Newman ... script editor
Caroline Sanders ... production accountant (as Caroline Russell)
Joanna Sanders ... assistant production accountant
Patrick Smith ... picture publicist
Crew believed to be complete

Production Companies




Special Effects


Other Companies



Plot Summary

Poirot is visited by a distraught girl, Norma Restarick, who fears she may have killed someone but runs away, telling him that he's too old rather than explaining further. By coincidence, Poirot's friend Ariadne Oliver lives in the same apartment block as Norma and her two roommates and recently went to their party, where Norma was distressed when she was offered ice cream. Norma's ex-nanny, Miss Lavinia Seagram, an alcoholic, also lived in the block but was recently found dead, with the verdict being suicide. Ariadne is unconvinced and searches the nanny's apartment, finding a clue which she puts in her handbag. Soon afterward she is attacked and the bag and its contents are stolen. Poirot visits the Restarick family home in the country, owned by Norma's great-uncle, Sir Roderick, an elderly and half-blind man who is dependent upon Sonia, his young personal assistant (who may well be a gold-digger). Andrew Restarick, Norma's father, explains to Poirot that he spent much of Norma's childhood working abroad, leaving her with her unstable mother and Nanny Seagram. Norma admits to Poirot that she blames herself for her mother's suicide, which took place when the little girl was on an outing with the nanny and wanted to stop for an ice cream. She now believes that if she had got home earlier she would have saved her mother, hence her revulsion at being offered ice cream. Poirot and Ariadne visit Miss Battersby, Norma's former school teacher, where they discover something very suspicious about Norma's friends and family. Also convinced that Miss Seagram's death was not suicide, Poirot enlists Norma's help in setting a trap to catch whoever killed her old nanny and is now trying to frame her. Written by don @ minifie-1

Plot Keywords
Parents Guide View content advisory »

Additional Details

Also Known As
  • Third Girl (United Kingdom)
  • 93 min
Filming Locations

Did You Know?

Trivia Look closely and you'll see a painting in the artist's studio that was used fifteen years earlier in the episode, "Dead Man's Mirror." See more »
Movie Connections Version of Crimes haute couture (2017). See more »
Quotes Ariadne Oliver: You do think of things, don't you?
Hercule Poirot: Ah.
Ariadne Oliver: What a calculating mind!... And tortorous! That's what I call it - tortorous!
Hercule Poirot: Am I so calculating, Madame? Am I a solver of puzzles with a heart that is cold? Or are we looking at the greatest of mysteries that life ever throws up... the mystery that even I, Hercule Poirot, will never be able to solve - the nature of love.
See more »

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