'The New Doctor Who'.

A description is provided for writers on the series for the proposed new Doctor Who, to replace William Hartnell. At the time this is believed to have been written, Hartnell's successor had not yet been cast and - more importantly - Hartnell himself had not agreed to leave the series.

Interviewed for 'Pebble Mill' in 1973, Patrick Troughton confessed that he'd been so worried about typecasting that he'd considered playing the Doctor in black face with a turban. Though no documentary evidence exists to back up this claim, it's known that a variety of other costumes were considered, including that of a sea captain, prior to series creator Sydney Newman deciding that the character should be more like Charlie Chaplin, or 'a cosmic hobo', as Newman put it.