A Dalek:
Prince Charles and the Duchess of Cornwall were on a visit to the set at BBC Wales' Roath Lock studios on day three of their summer tour of Wales.
The couple also met Matt Smith, who currently plays the Doctor but is stepping down, and Jenna Coleman, who plays his companion, as well as series head writer Mr Moffat.
The tour included the set of the Tardis, the Doctor's time travelling ship, as well as a display of some of the show's monsters, including a weeping angel and a cyberman.
I'm pretty sure he won't be the 13th Doctor...