Benedict Cumberbatch Sherlock Holmes Actor Martin Freeman John Watson Actor Rupert Graves Detective Inspector Lestrade Actor Una Stubbs Mrs Hudson Actor Louise Brealey Molly Hooper Actor Vinette Robinson Sgt. Sally Donovan Guest Star Zoe Telford Sarah Sawyer Guest Star John Lebar Golem Guest Star Gemma Chan Soo Lin Yao Guest Star Al Weaver Andy Galbraith Guest Star Bertie Carvel Sebastian Wilkes Guest Star Andrew Scott Jim Moriarty Actor Paul Chequer Dectective Inspector Dimmock Guest Star Janice Acquah Museum Director Guest Star James Duncan Jimmy Actor Katy Maw Beth Davenport Actor Lisa McAllister Anthea Guest Star Howard Coggins Brian Lukis Guest Star Philip Davis Jeff Hope Guest Star David Nellist Mike Stamford Guest Star Paul McGuigan Director Euros Lyn Director Steven Moffat Writer Mark Gatiss Writer, Executive Producer Steve Thompson Writer Beryl Vertue Executive Producer