Lionel Atwill

as Dr. Xavier (archive footage)

as Inspector Holtz

as Doctor Bohmer / Krogh (archive footage)

as Dr. Otto von Niemann (archive footage)

as (archive footage)

as Arntz, Police Officer (archive footage)

as Latimer Marsh / The Cobra

as Sir Eric Hazarias

as Pat Coyle

as Police Inspector Holtz

as Inspector Arnz

as Alec Ritchfield

as Charles Finch

as Cyrus Maldor

as Erich von Rugen, alias Alex Morel

as Waterlow

as Mayor of Vasaria

as Dr. Ralph Benson, posing as Graham

as Rawitch

as Professor Moriarty

as Dr. Bohmer

as Varnoff

as Teutonic Gentleman

as The Baron

as Dr. King

as Dr. Fish

as The Baron

as Dr. Paul Rigas

as Russell aka Henry Woodruff

as Harry Compton

as Dr. Suderman

as Cliveden Compton

as Dr. Bruce

as Jim McLaughlin

as Inspector Krogh

as Dr. James Mortimer

as Walter Stevens

as De Rochefort

as General Bazaine

as Professor Marakov

as Hugo Zurof

as Prof. Roger Chauncey Hildebrand

as Paul Messenger

as Count Anton 'Tony' Hohenfried

as Breuer

as Col. Fenwick

as Prosecutor

as M. Beaumarchais

as Col. Vigo

as Mike Roberts

as Maj. Gen. Sir John Sangye

as Mr. Stephen Whittaker

as Gerald A. Axton

as Ludwig

as Captain Cole

as Colonel Bishop

as Inspector Neumann

as Capt. Don Pasqual 'Pasqualito' Costelar

as Maj. William Brennan

as John 'Flint' Dawson aka John Daniels

as Colonel André Muffat

as Herr Von Sturm

as Brough

as Henry Dumont

as John Pointer

as Julius Beaufort

as Inspector Wallace

as Jerome Breen

as Aubrey St. John

as Eric Gorman

as Baron von Merzbach

as Ivan Igor

as Robert von Helldorf

as Dr. Otto von Niemann

as Sir Austin Howard

as Dr. Jerry Xavier

as The Surgeon

as Lester

as Kenneth Gordon

as Courtenay Urquhart