Ian McKellen character Sherlock Holmes
Laura Linney character Mrs. Munro
Milo Parker character Roger
Hiroyuki Sanada character Tamiki Umezaki
Roger Allam character Dr. Barrie
Frances de la Tour character Madame Schirmer
Hattie Morahan character Ann Kelmot
Phil Davis character Inspector Gilbert
Patrick Kennedy character Thomas Kelmot
John Sessions character Mycroft Holmes
Frances Barber character Matinee "Madame Schirmer"
Charles Maddox character Oswald
Takako Akashi character Maya Umezaki
Zak Shukor character Masuo Umezaki
Michael Culkin character Bank Manager
David Foxxe character Chemist
Oliver Devoti character Ticket Agent
Mike Burnside character Ann's Solicitor
Nicholas Rowe character Matinee "Sherlock Holmes"
Sam Coulson character Matinee "Thomas Kelmot"
Hermione Corfield character Matinee "Ann Kelmot"
Kit Connor character Boy
Zoe Rainey character Boy's Mother
Eileen Davies character Lady on Platform
Colin Starkey character Dr. John Watson
Sarah Crowden character Mrs. Hudson
Elizabeth Jane Cassidy character Waitress (uncredited)
Ben Farrow character Bank Clerk (uncredited)
John Carr character Patron in Cinema (uncredited)
