| Location of appearance | Title | Character | Gender | Age | Hair Color | Hair Style | Features |
| David Suchet | Detective | Hercule Poirot | M | 50+ | Dark | Thinning | Nice moustache |
| Hugh Fraser | Captain | Hastings | M | 50+ | Grey | | |
| Philip Jackson | Chief Inspector | James Japp | M | 50+ | Brown | | |
| Pauline Moran | Secretary | Felicity Lemon | F | 40+ | Chestnut | | |
| 1926 |
| New year party | | Andrew Marsh | M | 60+ | White | Thinning back right | Got rich from a copper mine on his Australian farm |
| New year party | Solicitor | John Siddaway | M | 50+ | Greying dark | Right combed | |
| New year party | | Sarah Siddaway | F | 50+ | Greyish | Bun | Robert’s wife |
| New year party | Elinfort Chairman | Dr Martin Pritchard | M | 40+ | Greying brown | Back right combed | Moustache |
| New year party | | Violet Wilson | F | 10+ | Ginger | Straight | Andrew’s ward |
| New year party | | Robert "Bobby" Siddaway | M | 10+ | | | |
| New year party | | Peter Baker | M | 10+ | | | |
| New year party | College principal | Phyllida Campion | F | 40+ | Blonde yellow | Mid split | |
| Non speaking part | House Keeper | Margaret Baker | F | 40+ | Brown | | Peter’s mother |
| Non speaking part | Local police sergeant | Walter Baker | M | 50+ | Dark | Back right combed | Margaret’s husband |
| Some years later |
| College debate | Debate leader | | M | 20+ | Brown to golden | Back right | |
| College debate | | Andrew Marsh | M | 70+ | White | Thinning back right | |
| Outside college | Runs "New Prospects" magazine | Violet Wilson | F | 20+ | Blonde yellow | Curly with a Right wave | Dress shimmering red with golden arms. Likes Robert |
| Outside college | College principal | Phyllida Campion | F | 50+ | Blonde yellow | | |
| College debate | Student | Robert "Bobby" Siddaway | M | 20+ | Brown | Mid split surf waves | |
| Crabtree lunch | Elinfort Chairman | Dr Martin Pritchard | M | 50+ | Greying brown | Back right combed | Moustache |
| Crabtree lunch | Solicitor | John Siddaway | M | 60+ | Silvering dark | Right combed | |
| Crabtree lunch | Children's nurse | Sarah Siddaway | F | 60+ | Greyish | Bun | Brown dress. Mole on right cheek. Robert’s wife |
| Outside Crabtree | Officer | Peter Baker | M | 20+ | Dark Blonde | Back left | Military uniform |
| Crabtree hall | House Keeper | Margaret Baker | F | 50+ | Brown | Right wave | Peter’s mother |
| Outside Crabtree | Police sergeant | Walter Baker | M | 60+ | Greyish Dark | Back right combed | Margaret’s husband |
| Outside Crabtree | Horse1 | | F | ? | Black | Mane | Ridden by Violet |
| Outside Crabtree | Horse2 | Samson | F | ? | Brown | Mane | Ridden by Hastings |
| London metro | | | M | 60+ | Greyish | Brown hat | Pushed Phyllida? |
| Hospital | Hospital Doctor | | M | 40+ | Dark brown | Back right combed | |
All the characters in the 1926-part of the story, also took part in the story some years later.