Series episode
Cast: (31 - show/hide all)
| Benedict Cumberbatch | ... | Sherlock Holmes |
| Martin Freeman | ... | Dr. John Watson |
| Rupert Graves | ... | DI Lestrade |
| Una Stubbs | ... | Mrs. Hudson |
| Mark Gatiss | ... | Mycroft Holmes |
| Louise Brealey | ... | Molly Hooper |
| Toby Jones | ... | Culverton Smith |
| Lindsay Duncan | ... | Lady Smallwood |
| Georgina Rylance | ... | Cornelia |
| Lee Kemp | ... | MI6 Agent |
| Gina Bramhill | ... | Faith |
| Martin Savage | ... | Ivan |
| Katy Wix | ... | Nurse Cornish |
| Matthew Romain | ... | Nervous Andrew |
| Vijay Doshi | ... | Gavin |
| Ben Abell | ... | Indignant Man |
| Asheq Akhtar | ... | Saheed |
| Miranda Hennessy | ... | Reporter |
| David Kirkbride | ... | Hospital Policeman |
| Usman Akram | ... | Agent |
| Dominic Borrelli | ... | Husband |
| Eileen Dunwoodie | ... | Wife |
| Amanda Abbington | ... | Mary Morstan |
| Sian Brooke | ... | Elizabeth |
| Tom Brooke | ... | Bill Wiggins |
| Lee Knight | ... | Reporter 2 |
| Eric Kofi-Abrefa | ... | Policeman 2 |
| Chris Wilson | ... | High Rank Police Officer |
| Sharon Cherry Ballard | ... | Police Woman |
| Helena Dennis | ... | Paparazzi |
| Lex Lamprey | ... | Photographer |
Crew:
| 500 Error | ... | Direction |
| Steven Moffat | ... | Script |