Second Doctor
The Second Doctor is an incarnation of the Doctor, the protagonist of the BBC science fiction television series "Doctor Who". He was portrayed by character actor Patrick Troughton.
History of Doctor Who
After actors Hugh David (later a director on the series) and Geoffrey Bayldon had both turned down approaches to star in the series, Verity Lambert and the first serial's director Waris Hussein managed to persuade 55-year-old character actor William Hartnell to take the part of the Doctor. Hartnell was known mostly for playing army sergeants and other tough characters in a variety of films, but Lambert had been impressed with his sensitive performance as a rugby league talent scout in the film version of "This Sporting Life", which inspired her to offer him the role.