The latest issue of Doctor Who Magazine, issue 407, which was released today, includes news on the second special of the year. Russell T Davies said; "The next three specials will be shown in the second half of the year. It was said, in some interviews, that all three would air around Christmas time, but plans have changed since then. We can't give away exact dates yet, except to say that you should be seeing Episode 4.16 before the Christmas period. The title of 4.16 will be revealed at the end of Planet of the Dead, along with a short trail, in which you'll see excerpts from what promises to be on of our scariest adventures ever. Events are going to darken around the Tenth Doctor as he heads towards the end of his tenure, and it all starts in Episode 4.16, as he and his co-stars are plunged into a world of terror, and we can no longer guarantee that the Doctor will escape unscathed!" The issue also reveals some guest stars who will appear in the episode, including; Peter O'Brien, Chook Sibtain, who previously appeared as Mark Grantham in The Sarah Jane Adventures, Alan Ruscoe, Sharon Duncan Brewster, Aleksandar Mikic, Gemma Chan, Cosima Shaw and Michael Goldsmith. The episode will star Lindsay Duncan as the Doctor's companion, Adelaide.