John Lucarotti
From Tardis Wiki, the free Doctor Who reference
John Lucarotti (20th May 1926-20th November 1994) wrote the screenplays Marco Polo, The Aztecs, and The Massacre of St Bartholomew's Eve. He later wrote the novelisations of all three stories (see Marco Polo (novelisation), The Aztecs (novelisation) and The Massacre (novelisation).)
