A serial killer is murdering women in the Whitechapel district of London. An American policeman is brought in to help Scotland Yard solve the case.
| Actor | Role |
|---|---|
 Lee PattersonSam Lowry | Sam Lowry |
 Eddie ByrneInspector O'Neill | Inspector O'Neill |
 Betty McDowallAnne Ford | Anne Ford |
 Ewen SolonSir David Rogers | Sir David Rogers |
 John Le MesurierDr. Tranter | Dr. Tranter |
 George RoseClarke | Clarke |
 Philip LeaverMusic Hall Manager / O'Reilly | Music Hall Manager / O'Reilly |
| BBarbara BurkeKitty Knowles | Kitty Knowles |
 Anne SharpHelen Morris | Helen Morris |
 Denis ShawSimes | Simes |
| EEndre MullerLouis Benz | Louis Benz |
 Esma CannonNelly | Nelly |
 George WoodbridgeBlake | Blake |
 Bill ShineLord Tom Sopwith | Lord Tom Sopwith |
 Marianne StoneDrunken Woman | Drunken Woman |
| GGarard GreenDr. Urquhart | Dr. Urquhart |
| DDorinda StevensMargaret / Maggie | Margaret / Maggie |
 John BarrettOnlooker at 2nd Murder Scene | Onlooker at 2nd Murder Scene |
 Patricia PhoenixRowdy Woman in the Crowd | Rowdy Woman in the Crowd |
 Jennifer WhiteBeth | Beth |