The Doctor
Matt Smith
Clara Oswin Oswald
Jenna Coleman
The Great Intelligence (voice)
Ian McKellen
Ice Governess (voice)
Juliet Cadzow
Uncle Josh
Jim Conway
Young Walter
Cameron Strefford
Walter's Mother
Annabelle Dowler
Bob Chilcott
Ben Addis
Lead Worker
Daniel Hyde
Girl
Sophie Miller-Sheen
Dr. Walter Simeon
Richard E. Grant
Strax
Dan Starkey
Jenny Flint
Catrin Stewart
Madame Vastra
Neve McIntosh
Captain Latimer
Tom Ward
Alice
Liz White
Digby Latimer
Joseph Darcey-Alden
Francesca Latimer
Ellie Darcey-Alden
Casting Director
Andy Pryor
Original Music Composer
Murray Gold
Second Unit Director
Saul Metzstein
Director
Writer
Steven Moffat
Executive Producer
Producer
Marcus Wilson
Caroline Skinner
Costume Designer
Howard Burden
Editor
William Oswald
Production Design
Michael Pickwoad
Director of Photography
Stephan Pehrsson
Makeup Designer
Barbara Southcott