Jovem Sherlock

Hero Fiennes Tiffin

Sherlock Holmes

Dónal Finn

James Moriarty

Zine Tseng

Princess Gulun Shou'an

Natascha McElhone

Cordelia Holmes

Max Irons

Mycroft Holmes

Stephen Agnew

Nathan Burford

Paul Ansdell

Judge

Paul Antony-Barber

Professor Charles Thompson

Nicholas Asbury

Dignitary Ezra Hornsby

Ravi Aujla

Professor Kishore Malik

Jeff Bennett

Smudger

Billy Byers

Young Mycroft

Katharine Church

Student

Annie Cordoni

Gloria

Lucien Guo

Young Sherlock

Mark Hawkins

Asylum Director

Steven Hillman

Newgate Prison Warder

Purdy Hughes

Young Beatrice