How many movies have John Leeson and John Nathan-Turner collaborated on?

They have worked on 9 movies together! Their first movie together was Doctor Who: The Power of Kroll (1979) while their highest rated movie together was Doctor Who: Remembrance of the Daleks (1988). They have not worked together since Doctor Who: Remembrance of the Daleks (1988). They are most known for their science fiction films together.