Agatha Christie's fictional universe

In Agatha Christie's novels several characters cross over different sagas, creating a fictional universe in which most of her stories are set. The most notable example is the novel The Pale Horse, which features Ariadne Oliver, Major Despard and his wife Rhoda (all had previously appeared on Cards on the Table) and Mrs Dane Calthrop (from The Moving Finger).[1]

List of cross-overs

Crossovers by Christie

Story Length Year Crossing-over characters
The Mystery of the Blue Train Novel 1928 Hercule Poirot, Katherine Grey (who lives in St. Mary Mead)
The Case of the Discontented Soldier Short story 1932 Parker Pyne, Ariadne Oliver, Miss Lemon[2]
The Case of the Middle-aged Wife Short story 1932 Parker Pyne, Miss Lemon
The Second Gong Short story 1932 Hercule Poirot, Mr. Satterthwaite
Three Act Tragedy Novel 1934 Hercule Poirot, Mr. Satterthwaite
Cards on the Table Novel 1936 Hercule Poirot, Ariadne Oliver, Superintendent Battle, Colonel Race, Colonel Despard, Rhoda Despard[3]
Death on the Nile Novel 1937 Hercule Poirot, Colonel Race
The Moving Finger Novel 1942 Miss Marple, Mrs Dane Calthrop, Rev Dane Calthrop
Towards Zero Novel 1944 Superintendent Battle, Hercule Poirot (mentioned)
The Labours of Hercules Collection of related short stories 1947 Hercule Poirot, Miss Lemon, Sherlock and Mycroft Holmes (mentioned)
Mrs McGinty's Dead Novel 1952 Hercule Poirot, Ariadne Oliver
Hickory Dickory Dock Novel 1955 Hercule Poirot, Miss Lemon
Dead Man's Folly Novel 1956 Hercule Poirot, Ariadne Oliver, Miss Lemon
Cat Among the Pigeons Novel 1959 Hercule Poirot, Mr. Robinson, Colonel Pikeaway
The Pale Horse Novel 1961 Ariadne Oliver, Colonel Despard, Rhoda Despard, Mrs Dane Calthrop, Rev Dane Calthrop
The Clocks Novel 1963 Hercule Poirot, Superintendent Battle (mentioned)
At Bertram's Hotel Novel 1965 Miss Marple, Mr. Robinson
Third Girl Novel 1966 Hercule Poirot, Ariadne Oliver, Miss Lemon
Hallowe'en Party Novel 1969 Hercule Poirot, Ariadne Oliver
Passenger to Frankfurt Novel 1970 Mr. Robinson, Colonel Pikeaway
Elephants Can Remember Novel 1972 Hercule Poirot, Ariadne Oliver, Miss Lemon
Postern of Fate Novel 1973 Tommy and Tuppence, Mr. Robinson, Colonel Pikeaway
Hercule Poirot and the Greenshore Folly Novella 2013 Hercule Poirot, Ariadne Oliver, Miss Lemon

Crossovers by others

Outside of stories by Christie herself, adaptations of her works have also featured crossovers:

Other stories

Hercule Poirot

Miss Marple

Mr. Satterthwaite

Parker Pyne

Superintendent Battle

Tommy and Tuppence

Colonel Race


  1. Fictional World of Agatha Christie
  2. Ariadne Oliver
  3. Ariadne Oliver
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