Medverkande
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Benedict CumberbatchSherlock - Martin FreemanWatson
- Rupert GravesDI Lestrade
- Una StubbsMrs. Hudson
- Louise BrealeyMolly Hooper
- Russell ToveyHenry Knight
- Amelia BullmoreDr Stapleton
- Clive MantleDr Bob Frankland
- Simon Paisley DayMajor Barrymore
- Sasha BeharDr Louise Mortimer
- Will SharpeCorporal Lyons
- Stephen WrightFletcher
- Gordon KennedyGary
- Kevin TrainorBilly
- Rosalind KnightGrace
- Chipo ChungPresenter
- Paul McGuiganRegissör
- Mark GatissProducent
- Beryl VertueProducent
- Steven MoffatFörfattare
- Mark GatissFörfattare