David Harewood, the British actor who is best known for his roles in shows such as Criminal Justice, Friar Tuck and Robin Hood, has revealed that he will be appearing in an upcoming episode of Doctor Who. He revealed this while doing an interview with Jonathan Ross last Saturday on BBC Radio 2, and he was also seen on set for filming of the last 2 specials. David Harewood has previously starred in the TV adaptions of The Ruby in the Smoke and The Shadow in the North, which also starred Billie Piper who played Rose Tyler in Doctor Who, and Matt Smith, who will play the 11th Doctor in series 5 of Doctor Who. At the moment it is unknown who he will play, but more information will be posted as soon as it becomes available.