Benedict Cumberbatch

as Sherlock Holmes

Martin Freeman

as Dr. John Watson

Una Stubbs

as Mrs. Hudson

Rupert Graves

as DI Lestrade

Mark Gatiss

as Mycroft Holmes

Andrew Scott

as Professor Moriarty

Louise Brealey

as Molly Hooper

Amanda Abbington

as Mary Watson

Jonathan Aris

as Anderson

Douglas Mackinnon

Director