Series episode
Cast: (25 - show/hide all)
| Benedict Cumberbatch | ... | Sherlock Holmes |
| Martin Freeman | ... | Dr. John Watson |
| Una Stubbs | ... | Mrs. Hudson |
| Rupert Graves | ... | DI Lestrade |
| Mark Gatiss | ... | Mycroft Holmes |
| Andrew Scott | ... | Jim Moriarty |
| Louise Brealey | ... | Molly Hooper |
| Danny Webb | ... | DI Carter |
| Andrew Havill | ... | The Equerry |
| Todd Boyce | ... | Neilson |
| Oona Chaplin | ... | Jeanette |
| Richard Cunningham | ... | Timid Man |
| Rosemary Smith | ... | Married Woman |
| Simon Thorp | ... | Businessman |
| Anthony Cozens | ... | Geeky Young Man |
| Munir Khairdin | ... | Creepy Guy |
| Nathan Harmer | ... | Phil |
| Luke Newberry | ... | Young Policeman |
| Darrell Las Quevas | ... | Plummer |
| Rosalind Halstead | ... | Kate |
| Peter Pedrero | ... | Archer |
| Honor Kneafsey | ... | Little Girl |
| Ilana Kneafsey | ... | Little Girl |
| Thomasin Rand | ... | Beautiful Woman |
| Lara Pulver | ... | Irene Adler |
Crew:
| Paul McGuigan | ... | Direction |
| Steven Moffat | ... | Script |