This season is one of my early projects.
Characters may be out of order.
| Title | Character | Gender | Age | Hair Color | Hair Style | Features |
| Detective | Hercule Poirot | M | 50+ | Dark | Thinning | Rents flat 10 |
| Miss | Lemon | F | 40+ | Pretends to be Penelope Maitland from the Ladies Companion magazine | ||
| Stella Robinson | F | 30+ | Golden | Wavy | Rents flat 6 | |
| James Robinson | M | 30+ | Dark | Right combed | Stella’s husband | |
| Navy clerk | Luigi Valdarno | M | 30+ | Dark | Back combed | |
| Singer | Carla Romero | F | 30+ | Dark | Wavy | Suspected stealer of Submarine plans according to Mr Paul |
| Carla’s husband | Romero | M | 30+ | Dark | ||
| Mr | Paul | M | 60+ | White | Bowler hat | Spectacles |
| Club Manager | Bernie Cole | M | 50+ | Dark | Thining | Chubby, Brown moustache. Manager of the Blue Cat club |
| Mafia Assassin | ||||||
| FBI Agent | Burt | M | 40+ | Dark brown | Thinning | Chubby American |
| Records Agent | O'Brian | |||||
| F | 30+ | Orange | Curly | Was denied the cheap flat | ||
| Landlady | F | 30+ | Dark | Wavy | Rents out the flat | |
| Teddy Parker | M | 50+ | Greyish | One wave | Friend of the Robinson’s | |
| M | 40+ | Dark | Thin, Sinister hat | Dark moustache. Suspected to be a tourist according to Mr Paul | ||
| Gardener | M | Looks exactly like sergeant Dawntry | ||||
| Singer | Elsa Hart ("Elsie"?) | F | 30+ | Dark | Wavy | Canadian singer at the Blue Cat club, according to Bernie |
| Elsas husband | M | 30+ | Dark | Opens Elsa Hart’s door |