premise: There is a person that has had acting roles name Tom Baker.
hypothesis: Thomas Calvin Baker ( June 11 , 1913 -- January 3 , 1991 ) , known as Tom Baker and nicknamed `` Rattlesnake '' , was an American Major League Baseball player . Tom Baker ( August 23 , 1940 -- September 2 , 1982 ) was an American actor who starred in the Andy Warhol film I , A Man ( 1967 ) . Thomas Stewart `` Tom '' Baker ( born 20 January 1934 ) is an English actor . He is known for his portrayal of the fourth incarnation of the Doctor in the science fiction series Doctor Who from 1974 to 1981 , a longer tenure than any other actor , and for the narration of the comedy series Little Britain . He went on to play the villainous Prince Koura in The Golden Voyage of Sinbad in 1973 , which led to his casting in Doctor Who .