1890, London, and a serial killer known as The Terror is murdering policemen. When gentleman thief Nicholas Revel unwittingly becomes the chief suspect, he must use his guile and wits to prove he’s not the killer; whilst also not getting caught for a jewel robbery he has just committed.
| Actor | Role |
|---|---|
 Peter LawfordNicholas Revel | Nicholas Revel |
 Dawn AddamsJane Frensham | Jane Frensham |
 Roland CulverConnor | Connor |
 Derek BondChristopher Lenhurst | Christopher Lenhurst |
 Leslie DwyerErnie Perker | Ernie Perker |
 Michael HordernHerbert Frensham | Herbert Frensham |
 Colin GordonMacStreet | MacStreet |
 Heather ThatcherMrs. Chumley Orr | Mrs. Chumley Orr |
 Jack McNaughtonFord | Ford |
| CCampbell CottsMr. Chumley Orr | Mr. Chumley Orr |
 Fabia DrakeLady Elmbridge | Lady Elmbridge |
 Michael GoodliffeAnderson | Anderson |
 Moultrie KelsallMagistrate of Court | Magistrate of Court |
 Peter CopleyCummings | Cummings |
| RRichard ShawThe Terror | The Terror |
 Sam KyddReporter (uncredited) | Reporter (uncredited) |