Frederick Worlock

as Horace (voice) (archive footage)

as Lord Burghley

as Blodgett

as Mr. Martindale (Lawyer) (uncredited)

as Lord Derby

as Elderly Colonel (uncredited)

as Horace / Inspector Craven (voice)

as Laelius

as Judge

as Gus Harrison

as Mr. Betts

as Barclay

as Dan Mintz

as Earl of Gloucester

as Lord Mayor (uncredited)

as Duke of Bedford, England's Regent

as Prosecutor (uncredited)

as J. Norton Sims

as Judge (uncredited)

as Actor in "Othello"

as Inspector Hobday

as Cadum

as Gen. Webb

as Clerk

as Doctor (uncredited)

as Henderson

as Colonel Cavanaugh

as Park Patrol Constable-in-Charge Ernie Hobbs

as Prof. William Kilbane

as Landers - Newgate Prison Governor (uncredited)

as Prime Minister

as John Brent

as Sir Humphrey Mong

as Dr. Onslow

as Supt. Clay (uncredited)

as Sam--Waiter at Inn

as Businessman (uncredited)

as Radio Newscaster (voice) (uncredited)

as Geoffrey Musgrave

as Sir Roger Wembley

as Sir James Langley

as Von Ritter - Ministry of Information (uncredited)

as Patrick Berwick

as Otto

as Eugene Caldwell (as Frederic Worlock)

as Speaker of Assembly (uncredited)

as Hugo Stregel

as Aristocratic Landowner (uncredited)

as Grenfall

as Dr. Jackwin

as President of Court Martial

as Dr. Richards

as Sir Henry

as Canadian Major

as Dr. Heath

as Lord Gerald Risborough

as Solicitor-General

as English Governor

as Insp. Hugh Drake

as Defense Counsel

as Communist President

as Darnell

as Stephen Harmon

as Grideau, the Prison Head

as Sir William Johnson

as Lord Elfie (uncredited)

as Ramensky

as Colonel Demassey

as Dr. Cesar Sabbatt