Effects Supervisor Danny Hargreaves explains how he achieved the fireball effect.
Sophie Stone and Zaqi Ismail talk about their characters, Cass and Lunn.
How do you become the scariest ghost on television? Actor Colin McFarlane explains about becoming a ghost!
Peter Capaldi talks about the Doctor Who take on ghosts, this story of Under the lake and its twist.
Filming an underwater base on dry land is no easy feat – cast and crew tell of Doctor Who tells you how they did that.
Peter Capaldi tells us more about the story behind those handy cards from Clara the Doctor keeps in his pocket. It’s on the cards, that’s for sure!
