Thomas Stewart "Tom" Baker (born 20 January 1934) is a British actor and comedian. He is best known for playing the fourth incarnation of the Doctor in the science fiction television series, Doctor Who, a role he played from 1974–1981.
The Doctor and Commander Sandra Armstrong are brought to Gallifrey by the Keeper who requests their help in repairing the Time Distortions which threaten the entire web of time, caused by Rassilon. The Doctor summons his previous incarnations to help repair the time distortions.
