Boris Karloff

Dr. Fu Manchu

Lewis Stone

Nyland Smith

Karen Morley

Sheila Barton

Charles Starrett

Terence Granville

Myrna Loy

Fah Lo See

Jean Hersholt

Von Berg

Lawrence Grant

Sir Lionel Barton

David Torrence

McLeod

C. Montague Shaw

Curator Dr. Fairgyle - British Museum Official (uncredited)