"It is emphasized that the "ship" may transport the four characters backwards or forwards, sideways into lesser or greater dimensions or into non-gravitational existence or invisibility etc, but once arrived into the different place and time the four characters have only their intelligence and ingenuity upon which to rely. They cannot produce a "ray gun" to reduce a horde of Picts and Scots, nor can they rely upon specialized drugs to cure a Greek philosopher.
'It is also emphasised that the four characters cannot make history. Advise must not be proffered to Nelson on his battle tactics while approaching the Nile, nor must bon mots be put into the mouth of Oscar Wilde. They are four people plunged into alien surroundings, armed with only their courage and cleverness. "
'It is also emphasised that the four characters cannot make history. Advise must not be proffered to Nelson on his battle tactics while approaching the Nile, nor must bon mots be put into the mouth of Oscar Wilde. They are four people plunged into alien surroundings, armed with only their courage and cleverness. "
David Whitaker's guildelines for Doctor Who writers - 16 May 1963