The Long Dark Hall

Arthur Groome

Mary Groome

Sheila Groome

Rosemary Groome

Mary's mother

Mary's father

The Man

Mrs Rogers

Supt. Maxey

Chief Inspector Sullivan

Sergeant Cochcran

Sir Charles Morton

Clive Bedford

Judge

Rose Mallory

Marjorie Danns

Dr Conway

Leslie Scott

Pound

Jefferson

Mr Polaris

Mrs Sims

Alfred Tripp

Mrs Polaris