| Room | Location of appearance | Title | Character | Gender | Age | Hair Color | Hair Style / direction | Features |
| 8? | Announced | Detective | Hercule Poirot | M | 50+ | Dark | Back | |
| London Party | ||||||||
| Outside car | Foreign Secretary | Anthony Morgan | M | 60+ | Dark grey | Right | Moustache | |
| Announced | Sir | Peter Tavistock | M | |||||
| Announced | Lady | Tavistock | F | |||||
| Announced | Lady | Celia Morgan | F | 60+ | Greying dark | Curly | ||
| Announced | Parliament Secretary | Harold Waring | M | 30+ | Dark | Right combed | Anthony's secretary | |
| Announced | Judge | Richard Stubbs | M | |||||
| Hall | Chief Inspector | M | 50+ | White | Balding | Disguised as waiter, very dark eyebrows. (With some policemen) | ||
| Referred | Jewel thief | Marrascaud | ? | |||||
| Hall | Madam | Lucinda Le Mesurier | F | 20+ | Dark | Wavycurly, tiara | Bejewelled | |
| Paintings room | Policeman | M | 20+ | White | Wig | Disguised as a guard | ||
| Hall | Policewoman | F | 40+ | Dark | Curly | Disguised as a maid | ||
| ? | F | 30+ | Blonde | Long, curly ends | Bumped into Poirot | |||
| 3 months later | ||||||||
| Doctor's office | Doctor | Burton? | M | 60+ | Grey | Thin | White beard | |
| Car | Driver | Ted Williams | M | 20+ | Dark brown | Right | In love with maid Nita | |
| Referred by Ted | Maid | Nita | F | 20+ | Blonde | Long, wavy | Katrina's maid | |
| Waiting room for the Funicular carriage, Switzerland | ||||||||
| Waiting room | Inspector | Lementuil | M | 40+ | Dark | Full beard | ||
| Referred by Lementhuil | Lieutenant | Drouet | M | Undercover | ||||
| 10 | Waiting room reading | Mrs | Elsie Clayton | F | 30+ | Dark brown | Hat | |
| Waiting room reading | Mrs | Annabel Rice | F | 50+ | Dark mahogany | Flat-cap, curly | Elsie's mother | |
| Waiting room writing | Insurance investigator | Schwartz | M | 30+ | Orangy brown | Back right | Moustache. Likes word games | |
| 9? | Waiting room, late entry | Parliament Secretary | Harold Waring | M | 30+ | Dark | Right combed | Has an illegitimate child, Anthony's secretary |
| Passing carriage | ||||||||
| 13 | Carriage | Countess | Vera Rossakoff | F | 50+ | Dark brown | Right, Wavy | Knew Poirot from 20 years ago |
| Hotel Olympos, Switzerland | ||||||||
| Arrival | Hotel Manager, Dr | Francesco Rosato Krier | M | 50+ | Greying dark | Parted, thinning, curly | Brown moustache. Used to run a night club in Brindisi | |
| Arrival | Servant | Gustave aka Lieutenant Drouet? | M | 50+ | Greying dark | Very short, thinning, forward | Tanned | |
| Referred by Annabel | Ex-servant | Robert | M | |||||
| Referred by Elsie | Elsie's angry husband | Philip Clayton | M | Heard as if he had a heated argument with Elsie upon her arrival | ||||
| 16 | Referred by Poirot | Dancer | Katrina Samoushenka | F | 20+ | Dark chestnut | Wavy down | |
| 17 | Terrace | Dr | Heinrich Lutz | M | 60+ | White | Back right | Dark & grey beard, spectacles |
| Referred by Poirot | Maid | Nita | F | Katrina's maid. Did not come to Hotel Olympos? | ||||
| 14 | Terrace | Criminologist | Alice Cunningham | F | 20+ | Golden brown | Right, wavy swirly | Vera's daughter |
| Dining Room | Ugly dog | Binky Cerboros | ? | ? | Dark grey | Alice's dog | ||
| Locations | Info |
| Hotel Olympos | Rochers Neiges, La Clinique Alpine, Switzerland |
| Vera Rossakoff also appears in |
| The Big Four (Book) (But not in the TV episode S13E02) |
| The Double Clue (Short story and TV episode S03E06) |
| The Labours of Hercules (TV-episode S13E04) |
| The Capture of Cerberus (Story from the Labours of Hercules series) |
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