A case of stolen letters leads Sherlock Holmes into a long conflict with Charles Augustus Magnussen, the Napoleon of blackmail, and the one man he truly hates. But how do you tackle a foe who knows the personal weakness of every person of importance in the Western world?
| Creator | Mark Gatiss |
|---|---|
| Actor | Benedict Cumberbatch, Martin Freeman |
| Country | United Kingdom, United States of America |
| Production | Hartswood Films |
