The Long Dark Hall

Rex Harrison

Arthur Groome

Lilli Palmer

Mary Groome

Anthony Dawson

The Man

Brenda De Banzie

Mrs Rogers

Ballard Berkeley

Supt. Maxey

Raymond Huntley

Chief Inspector Sullivan

William Squire

Sergeant Cochcran

Denis O'Dea

Sir Charles Morton

Anthony Bushell

Clive Bedford

Patricia Cutts

Rose Mallory

Meriel Forbes

Marjorie Danns

Michael Medwin

Leslie Scott

Colin Gordon

Pound

Lionel Murton

Jefferson

Eric Pohlmann

Mr Polaris

Jenny Laird

Mrs Sims

Jill Bennett

1st Murdered Girl

Tania Heald

Sheila Groome

Henrietta Barry

Rosemary Groome

Dora Sevening

Mary's mother

Ronald Simpson

Mary's father

Henry B. Longhurst

Judge

Douglas Jefferies

Dr Conway

Frank Tickle

Alfred Tripp