The Doctor has retired to 1892 London. Despite the protests of his allies, he is determined to keep out of mankind's affairs. However, a governess named Clara has stumbled upon a plot which only the Doctor can unravel, involving the death of her predecessor in ice and the sinister Dr. Simeon, who controls monsters made of sentient snow. And there is another mystery afoot: Clara is the spitting image of Oswin Oswald, whom the Doctor saw die in the Dalek asylum...
as The Doctor
as Clara Oswin Oswald
as Dr. Walter Simeon
as Strax
as Jenny Flint
as Madame Vastra
as Captain Latimer
as Alice
as Digby Latimer
as Francesca Latimer
as The Great Intelligence (voice)
as Ice Governess (voice)
as Uncle Josh
as Young Walter
as Walter's Mother
as Bob Chilcott
as Lead Worker
as Girl