In 1966, "Doctor Who" producer Innes Lloyd looked for a replacement for William Hartnell in the series' lead role. The continued survival of the show depended on audiences accepting another actor in the role, despite the bold decision that the replacement would not be a Hartnell lookalike or soundalike. Lloyd later stated that Hartnell had approved of the choice, saying, "There's only one man in England who can take over, and that's Patrick Troughton". Lloyd chose Troughton because of his extensive and versatile experience as a character actor. After he was cast, Troughton considered various ways to approach the role, to differentiate his portrayal from Hartnell's amiable-yet-tetchy patriarch. Troughton's early thoughts about how he might play the Doctor included a "tough sea captain", and a piratical figure in blackface and turban. "Doctor Who" creator Sydney Newman suggested that the Doctor could be a "cosmic hobo" in the mould of Charlie Chaplin, and this was the interpretation eventually chosen. Troughton was the first Doctor to have his face appear in the opening titles of the show. In one serial, "The Enemy of the World", Troughton played two parts: as the protagonist (The Doctor) and the antagonist (Salamander).