A researcher investigating a notorious serial killer who was hanged 20 years earlier seemingly becomes possessed by the long dead strangler.
| Actor | Role |
|---|---|
 Boris KarloffJames Rankin | James Rankin |
 Jean KentCora Seth | Cora Seth |
 Elizabeth AllanBarbara Rankin | Barbara Rankin |
 Anthony DawsonSupt. Burk | Supt. Burk |
 Vera DayPearl | Pearl |
 Tim TurnerDr. Kenneth McColl | Dr. Kenneth McColl |
| DDiane AubreyLily Rankin | Lily Rankin |
| MMax BrimmellNewgate Prison Turnkey | Newgate Prison Turnkey |
 Leslie PerrinsNewgate Prison Governor | Newgate Prison Governor |
| JJessica CairnsAsylum Maid | Asylum Maid |
 Dorothy GordonHannah | Hannah |
 Desmond RobertsDr. Johnson | Dr. Johnson |
| RRoy RussellMedical Superintendent | Medical Superintendent |
 Derek BirchGuyse Hospital Superintendent | Guyse Hospital Superintendent |
| PPeggy Ann CliffordKate | Kate |
 John FabianYoung Blood | Young Blood |
| JJoan ElvinCan-Can Girl | Can-Can Girl |
| AAudrey SykesLaughing Lady at Hanging (uncredited) | Laughing Lady at Hanging (uncredited) |
 Marie DevereuxShow Girl (uncredited) | Show Girl (uncredited) |