More filming took place in Cardiff for Planet of the Dead in the last few nights, so we now have some news on who will be in the special episode. Michelle Ryan, the ex-Eastenders and Bionic Woman star will play the mysterious Lady Christina de Souza, who joins the Doctor on a bus trip which takes a detour into danger. Lee Evans will play Malcolm, a character whose life becomes connected to the Doctor's under extraordinary circumstances, and Noma Dumezweni will return as Captain Erisa Magambo who was last seen in Turn Left. Stay tuned for more news on the Doctor Who specials here. To keep up to date with the latest filming pictures then you are best to go to the Doctor Who Forum, although you will have to register, it is a great source. Also Life, Doctor Who and Combom is a great site to visit for filming pictures. What do you think of the latest casting update?