John Williams

Self (archive footage)

Sire Montrose

Mansfield

Jameson

Judge

Arthur Frankland

Roger Haversham

Doctor (segment “The Caterpillar”)

Colonel Hymber Masters (segment "The Doll")

Dr. Finache

Gen. Francis Mayhew

Gerald Waverly

Lord Richard Weston

Nigel 'Niles' French

J. Fredrick Duval

Sir Nigel Scott

Jonathan Martin

Peregrine Upjohn

Insp. Robert Briscoe

Inspector Robert Briscoe

Colonel Pickering

Edmund Tinsley

Gordon Bentley

Dr. George Hazard

Nicolas Constantine

Stevens

Inspector Byrnes

Sir Guy

Delton

William Shakespeare

Gilbert Dickinson

Brogan-Moore

Col. Selby

Irving La Salle Jr.

Colonel Whittingham

John T. 'Jack' Blessington

Brig. Russell

Walker Hendricks

Herbert Carpenter

Alexander Penn Arlington

Capt. Smollet

Alexander Vinton

Inspector Davidson

Ernest Findlater

Inspector Brent

H. H. Hughson

Sir Keith Nottingham

Harold Johnson

Thomas Fairchild

Lutz

Chief Inspector Hubbard

General Sir Henry Harrison

Inspector Hubbard

Colonel Pickering

Archbald Puffin

Mr. Foster

Prosecuting Counsel

Maj. Bishop

'English' Army Captain

General Cooper (uncredited)

Voice over (uncredited)