The process through which the editor of the movie gave for the change of the cast for the doctor who movie is that he first doctor had undergone renewal. The renewal process was later changed by the people and fans around to familiar term “regeneration”. The name of the man that replaced William Hartnel was Patrick Troughton, this man played the role nicely till 1970, and before another actor called Joe Pertwee took over from him. There have been so many people that acted the role of the doctor in the Doctor Who movie and all have been seen to be very good at what they do. The role of the doctor was later given to a man called Tom Baker, and this was the particular one that is very much known among all the actors that took over from the first doctor. Later on, when anybody is to be recognized as the doctor in Doctor Who DVD, it is most likely going to be Tom Baker. He was well remembered and most popular of them all. Peter Davison, Colin Baker and McCoy were all names of doctors that substituted the first doctor. After the first substitution and the new process called renewal, the editors of the movie had to continue having the renewal process as no single doctor would be suitable for the role.