Fantastic special that not only celebrated the past , but provided us with the beginning to a very exciting future. The interplay between the three doctors is glorious and John hurt turns in a very strong performance as the doctor. There isn't much to complain about with this episode and it is the very best episode of dr who of the last few years. Congratulations have to be given to cast and crew, but especially Steven Moffat. Another thing that really struck me was the fact that Clara felt like a proper character and actually could turn out to be one of the best companions. Overall this special is very highly recommended.