Dirección: Robert Day
Un relato de misterio acerca de la investigación de macabros crímenes cometidos por un siniestro psicópata.
Boris Karloff
James Rankin
Jean Kent
Cora Seth
Elizabeth Allan
Barbara Rankin
Anthony Dawson
Supt. Burk
Vera Day
Pearl
Tim Turner
Dr. Kenneth McColl
Diane Aubrey
Lily Rankin
Max Brimmell
Newgate Prison Turnkey
Leslie Perrins
Newgate Prison Governor
Jessica Cairns
Asylum Maid
Dorothy Gordon
Hannah
Desmond Roberts
Dr. Johnson
Roy Russell
Medical Superintendent
Derek Birch
Guyse Hospital Superintendent
Peggy Ann Clifford
Kate
John Fabian
Young Blood
Joan Elvin
Can-Can Girl
Audrey Sykes
Laughing Lady at Hanging (uncredited)
Marie Devereux
Show Girl (uncredited)
Boris Karloff
James Rankin
Jean Kent
Cora Seth
Elizabeth Allan
Barbara Rankin
Anthony Dawson
Supt. Burk
Vera Day
Pearl
Tim Turner
Dr. Kenneth McColl
Diane Aubrey
Lily Rankin
Max Brimmell
Newgate Prison Turnkey
Leslie Perrins
Newgate Prison Governor
Jessica Cairns
Asylum Maid
Dorothy Gordon
Hannah
Desmond Roberts
Dr. Johnson
Roy Russell
Medical Superintendent
Derek Birch
Guyse Hospital Superintendent
Peggy Ann Clifford
Kate
John Fabian
Young Blood
Joan Elvin
Can-Can Girl
Audrey Sykes
Laughing Lady at Hanging (uncredited)
Marie Devereux
Show Girl (uncredited)
Boris Karloff
James Rankin
Jean Kent
Cora Seth
Elizabeth Allan
Barbara Rankin
Anthony Dawson
Supt. Burk
Vera Day
Pearl
Tim Turner
Dr. Kenneth McColl
Diane Aubrey
Lily Rankin
Max Brimmell
Newgate Prison Turnkey
Leslie Perrins
Newgate Prison Governor
Jessica Cairns
Asylum Maid
Dorothy Gordon
Hannah
Desmond Roberts
Dr. Johnson
Roy Russell
Medical Superintendent
Derek Birch
Guyse Hospital Superintendent
Peggy Ann Clifford
Kate
John Fabian
Young Blood
Joan Elvin
Can-Can Girl
Audrey Sykes
Laughing Lady at Hanging (uncredited)
Marie Devereux
Show Girl (uncredited)