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
as Twin (uncredited)
Walter P. Cole
as Human Skeleton (uncredited)
