The Doctor

Matt Smith

Acting

Clara Oswin Oswald

Jenna Coleman

Acting

Dr. Walter Simeon

Richard E. Grant

Acting

Strax

Dan Starkey

Acting

Jenny Flint

Catrin Stewart

Acting

Madame Vastra

Neve McIntosh

Acting

Captain Latimer

Tom Ward

Acting

Alice

Liz White

Acting

Digby Latimer

Joseph Darcey-Alden

Acting

Francesca Latimer

Ellie Darcey-Alden

Acting

The Great Intelligence (voice)

Ian McKellen

Acting

Ice Governess (voice)

Juliet Cadzow

Acting

Uncle Josh

Jim Conway

Acting

Young Walter

Cameron Strefford

Acting

Walter's Mother

Annabelle Dowler

Acting

Bob Chilcott

Ben Addis

Acting

Lead Worker

Daniel Hyde

Acting

Girl

Sophie Miller-Sheen

Acting