The news so far on the Doctor Who 50th anniversary Special (possible spoilers)...

It's the end of the first week of shooting on Doctor Who's 50th anniversary special, and certain pieces of information have been revealed over that time. Let's take a look at what's been ascertained so far...

The most exciting news, revealed last Saturday, is that David Tennant and Billie Piper are returning for the special. Hooray! Some people have speculated that he will be playing the 10.5 Doctor from Journey's End, but I think this is very unlikely. The audience wants to see the Tenth Doctor, not his substitute.

David Tennant has already been spotted filming this week. Anyone interested should search the web. So far there have been no clear pictures of Billie Piper, but I imagine that sooner or later they will be appearing. 

In other casting news, John Hurt, famous from the Harry Potter movies and I Claudius, is also making an appearance in the special. His casting has been overshadowed by the Tennant and Piper news, but it's great to have such an established actor in the show.

The Zygons will becoming back. Although these monsters have been popular it's the first time anyone tried to revive them. The production team appear to have stuck very closely to the original design with only minor modifications.

As with the Ice Warriors, they are keeping the design similar.

Another cast member is Joanna Page from Gavin and Stacey. People can find out who she is playing by looking at the spoiler pictures.

With Tennant, Piper, Hurt and the Zygons, the special is looking interesting. Who knows what other treats are in store for the viewers?