Sherlock Holmes and Dr. Watson find themselves in 1890s London in this holiday special.
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
Yasmine Akram
as Janine Donlevy
David Nellist
as Stamford
Catherine McCormack
as Lady Carmichael
