Planet of Fire was a piece of media that John Nathan-Turner and Peri Brown both worked on in Earth-33⅓. The pair carried the Doctor's TARDIS from an old slate quarry in Surrey all the way to an old slate quarry in Lanzarote so that location filming could commence there. Nathan-Turner claimed that some sacrifices had been made so he could get permission to film overseas. (COMIC: Doctor Who? 92)