A serial killer stalking the teen-aged daughters of the aristocracy brings Sherlock Holmes out of his drug-filled semi-retirement.
| Name | Type | Role | |
|---|---|---|---|
| Alan Cubitt | Writer | ||
| Nicholas Palliser | Guest Star | ||
| Neil Dudgeon | Guest Star | ||
| Rupert Everett | Guest Star | ||
| Ian Hart | Guest Star | ||
| Simon Cellan Jones | Director |