He was born in St Pancras, London. In 1932, he was in a movie called Say It With Music. He was in more than sixty movies. He usually played funny characters until 1944, when he was a sergeant in a movie called The Way Ahead. After that, he played a lot of policemen and soldiers. He was the main character in a movie called Carry on Sergeant in 1958. From 1957 to 1961, he appeared on a television show called The Army Game and in 1963, gave up movies and became the first Doctor in Doctor Who. Doctor Who was a new television show.
Hartnell was in Doctor Who for three years. In 1966, he got sick. He forgot some of his lines, and argued with the people who made the show. Then he left Doctor Who. Patrick Troughton became the new Doctor.
Hartnell's health got worse and in December 1974, he went to hospital. On 23 April 1975, he died in his sleep at the age of 67.
- "The First Doctor". BBC. http://www.bbc.co.uk/doctorwho/classic/episodeguide/index_first.shtml. Retrieved 2009-09-03.