Full Moon was to have been the first of four Halloween specials for The Sarah Jane Adventures, but due to the death of Elisabeth Sladen it was never produced. Like the other, proposed Halloween specials it was to have been a live 2011 broadcast and the show's first ever Halloween special.
It would have seen Sarah Jane and her gang encounter the Pagan Gods, Gog and Magog, who were trying to escape an alien spaceship.
It would have been succeeded by The Station, another special. (DWMSE 32)