Rogers – the Manservant (any adult age)

Mrs Rogers – the Housekeeper (any adult age; similar to Rogers)

Fred Narracott – the Boatman (any / may be double-cast with Marston)

Anthony Marston – the Playboy (20’s – early 30’s)

W. Blore – the Private Detective (any adult age)

General MacKenzie – the General (50+)

Emily Brent – the Spinster (late 30’s+)

Dr. Armstrong – the Doctor (30’s+)

Vera Claythorne – the Secretary (20’s – 30’s)

Philip Lombard – the Adventurer (similar to Vera)

Sir Lawrence Wargrave – the Judge (50+)