The Unholy Night

Dr. Ballou

Lord Montague

Lady Efra

Lady Vi

The Butler

Polly, Maid

Frey, Lord Montague's Orderly

The Mystic

Sir James Rumsey

Inspector Lewis

Major Mallory

Colonel Davidson

Captain Dorchester

Lieutenant Williams

Lieutenant Savor

Major Endicott

Captain Bradley

Major McDougal

Guest at First Seance

Abdul Mohammed Bey - the Hindu Lawyer (uncredited)