"Three sideshow performers form a conspiracy known as "The Unholy Three" - a ventriloquist, midget, and strongman working together to commit a series of robberies."
Lon Chaney
as Professor Echo / Granny O'Grady
Mae Busch
as Rosie O'Grady
Matt Moore
as Hector McDonald
Victor McLaglen
as Hercules
Harry Earles
as Tweedledee aka Little Willie
Matthew Betz
as Detective Regan
Edward Connelly
as Judge
William Humphrey
as Attorney for Defense
E. Alyn Warren
as Prosecuting Attorney
Margie Angus
as Twin (uncredited)
Mary Angus
Walter P. Cole
as Human Skeleton (uncredited)
Carrie Daumery
as Pet Shop Customer (uncredited)
Delmo Fritz
as Sword Swallower (uncredited)
Alice Julian
as Fat Lady (uncredited)
Peter Kortes
Mickey McBan
as Boy Watching Hercules' Act (uncredited)
Wilmuth Merkyl
as Jeweler (uncredited)
John Millerta
as Wild Borneo Man (uncredited)
Louis Morrison
as Police Commissioner (uncredited)
Majorie Morton
as Mrs. Arlington (uncredited)
Walter Perry
as Dime Museum Announcer (uncredited)
Louis Shank
as Newsboy (uncredited)
Vera Vance
as Dancer (uncredited)
Charles Wellesley
as John Arlington (uncredited)
Percy Williams
as Butler (uncredited)
Tod Browning
Director
Waldemar Young
Scenario Writer
Producer
Irving Thalberg
David Kesson
Director of Photography
Daniel J. Gray
Editor
Clarence Aaron 'Tod' Robbins
Story
Harvey Parry
Stunts
Cedric Gibbons
Set Decoration
Joseph C. Wright