The actor said:
As a committed Whovian I cannot believe my luck in joining the Twelfth Doctor for one of his inaugural adventures. My only worry is that they'll make me leave the set when I'm not filming.Executive producer and lead writer Steven Moffat observed:
Mark Gatiss has written us a storming villain for his new episode, and with Capaldi in the TARDIS, we knew we needed somebody special to send everybody behind the sofa. And quite frankly, it's about time Ben Miller was in Doctor Who!The Armstrong and Miller and Death in Paradise actor is the latest guest star to have been recently announced, joining a line-up this year that includes Tony Way, Keeley Hawes, Roger Ashton-Griffiths, and Tom Riley.