The Fourth Doctor is a fictional character from the British science fiction television series Doctor Who. Portrayed by actor Tom Baker from 1974 to 1981, he is known for his long scarf, curly hair, and eccentric personality. The Fourth Doctor traveled through time and space in the TARDIS, a time machine that looks like a British police box. This incarnation of the Doctor is famous for his wit, intelligence, and a sense of adventure. He often faced off against various villains, including the Daleks and Cybermen, while forming strong bonds with companions like Sarah Jane Smith. His era is celebrated for its imaginative storytelling and memorable episodes.