About Doctor Who Season 7, Episode 12 : Nightmare in Silver

Hedgewick's World of Wonders: the perfect theme park day out - and ground zero for a deadly silver resurrection. Guest Stars: Jenna Coleman, Warwick Davis, Tamzin Outhwaite, Eloise Joseph, Will Merrick, Jason Watkins, Kassius Carey Johnson, Eve de Leon Allen, Zahra Ahmadi, Nicholas Briggs, Aidan Cook, Calvin A. Dean,