The Shalka Doctor Takes On The Real Doctor This Christmas!

Famous British actor, Richard E. Grant, has officially been announced as the lead villain in this years "Doctor Who: Christmas Special". The festive episode will mark the first with out Amy and Rory and the first to feature the new companion, played by Jenna-Louise Coleman.
This episode also marks the third appearance by Grant, who previously played The Doctor in a 1990's Comic Relief special and then again played an alternate Doctor, known as The Shalka Doctor in an animated 2003 6-part series "Scream Of The Shalka". The role this time around is unknown yet, but I'm sure we'll all find out soon enough.