Barnaby
Forbes (uncredited)
Musician (uncredited)
Reporter (uncredited)
Detective Gannett
Alfred
Spectator
Inquisitive Stranger
Mr. Martingale
Bob's Butler (uncredited)
Constable Holly
Sneed, Hammle's Butler (Uncredited)
Salesman
Arthur Summers
Trelawney Redfern
Clerk in Chase's office
Englishman at Party (uncredited)
Cyril Glossop
Gryphon
Duke of Cleves
Harris
Wilberforce Strangeways
Ollie's Hospital Roommate
Richard Bentinck
Jellicott
Eustace
Basil Pistol
James Raleigh
Sylvester Wadsworth
Mr. Poffley
Jasper Hickson
Lord Wrench
Prof. Percy Willow
Mr. Z
Sylvester Wadsworth
Percy Penfield
Percy Jones
Dr. Eustace Gill
Raymond of Boston
Det. Hall
Lord Tarbotham
Monty Montgomery
Alfred Wimbledon
Andre's Assistant
Henry Fuller
Arthur Rockmere
Dal Brown
Gerly - The Valet
Theodore Van Felt
Archie
Lord Allan Harrowby
Mr. Belknap-Jackson
Wilbur
Reggie Barrett