Laelius

Judge (uncredited)

Dr. Heath

Prof. William Kilbane

Colonel Cavanaugh

Lord Gerald Risborough

Solicitor-General

Horace / Inspector Craven (voice)

Dr. Onslow

Clerk

Dr. Richards

J. Norton Sims

Otto

Insp. Hugh Drake

Park Patrol Constable-in-Charge Ernie Hobbs

Grideau, the Prison Head

Prime Minister

Inspector Hobday

Cadum

Patrick Berwick

Sir Humphrey Mong

English Governor

Henderson

Dr. Cesar Sabbatt

Stephen Harmon

Radio Newscaster (voice) (uncredited)

Canadian Major

Elderly Colonel (uncredited)

Gen. Webb

Mr. Martindale (Lawyer) (uncredited)

Actor in "Othello"

Colonel Demassey

Ramensky

Von Ritter - Ministry of Information (uncredited)

Lord Mayor (uncredited)

Eugene Caldwell (as Frederic Worlock)

Lord Elfie (uncredited)

Geoffrey Musgrave

Sir William Johnson

Darnell

John Brent

Grenfall

Communist President

Hugo Stregel

Lord Derby

Blodgett

Sir Henry

Sam--Waiter at Inn

Businessman (uncredited)

Sir Roger Wembley

Prosecutor (uncredited)

Supt. Clay (uncredited)

Aristocratic Landowner (uncredited)

Landers - Newgate Prison Governor (uncredited)

Dr. Jackwin

Duke of Bedford, England's Regent

Sir James Langley

Horace (voice) (archive footage)

Speaker of Assembly (uncredited)

Earl of Gloucester

Doctor (uncredited)

Lord Burghley